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Galaxy Tab unbricking service

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spacemoose1

Inactive Recognized Developer
Dec 16, 2010
366
1,151
Bowling Green, KY
www.robotmegacorp.com
Stumbled upon this a bit ago, a company called Mobile Tech is offering an "unbricking" service on all versions of the Galaxy Tab. At the time of this writing they charge $50. I have not used this service, am not in any affiliated with this company and cannot vouch for their work, so beware. Just thought someone out there might use this when other options aren't available.

They have a nifty video up on youtube showing how they do it:

 
Last edited:

btyork

Senior Member
Apr 16, 2010
1,267
173
Texas
I can actually vouch third party for this service. Have had two friends use it and the device was returned within a few days. If I'm not mistaken, the guy lives in the southern US, but can arrange international he says.

Sent from my "better than an iPad" tab... Running Overcome GINGERBREAD!!!
 

ManticoreX

Member
Jun 24, 2010
28
4
This is cool, but I would recommend trying to go through Samsung first if you are still under warranty. I screwed up my primary bootloader and contacted them. They took care of shipping costs, fixed it up, and sent it back in about a week and a half. If Samsung hadn't fixed it I would defiantly have payed the $50 here though.
 

carlsbad0331

Senior Member
Apr 28, 2007
210
8
WOW, that seems like a lot of work for $50.
Thanks for the info, should I ever screw something up its nice to know there are people out there who can clean up my mess!
 

cx5

Senior Member
Apr 4, 2009
367
81
a company called Mobile Tech is offering an "unbricking" service on all versions of the Galaxy Tab.

Hi spacemoose1

Thanks for link and as always, thanks for honeycomb port. I would like to ascertain the definition of BRICK? with your help, if I may.

(disclaimer: pls forgive my wrong terms or exagerated explanation, but most importantly, pls correct me if I'm wrong)

BRICKed = software total lost, must use JTAG to force revive it, Samsung has it, or buy from web supplier around 300 USD ??? 500 USD ???

JTAG is a device to push software into all newly borned IC. I.E. when factory make IC, it's empty software inside, hence has a special device to push voltage into all sections of the IC, then force the code in.

Another term is ???CRASH??? or ???HANG???, (I don't know) anyway is not BRICKed, hence a reflash can recover it.

Samsung uses proprietary method a lot, not follow conventional, make usb driver very complex. USB driver install EXE around 15MB to 28MB depends on version, ALL work the same.

but, when the device = sgt7 in different state/condition, the driver must RE-ESTABLISH again, or else cannot work.

I.E.
state 1 = "OPERATIONAL"device in android operation, normal use, surf web, phone call etc
state 2 = "SLEEP" device powered off, show battery big icon charging when powered by charger
state 3 = RECOVERY mode
state 4 = DOWNLOAD mode - this is one of the way to FORCE flash to recover, as long as bootloader and something still intact
state 5 = PHONE-!-PC mode
stage 6 = "COMA" device powered off, NO show of battery big icon, even when charger supplied. Don't panic, let it charge fully 4 hours from 2 amperes supply, 10 hours from PC 500mA. It will start again !!!. Battery big icon will appear around 30% battery charged, I know because that's what I saw. I didn't check when it's in 10% or 20%. The 1st time I check was already 30% up from no-boot or no respone.

User need to plug device into PC during each of the state above at least once, in order for various flashing functions to work.

i.e. when it's a newly arrived device, usually install the usb driver 1st, with device state in android OS running properly, then plug in to USB and see "new device detected" installing, pls wait. Finished.

But when flashing via Odin using state 4 = DOWNLOAD mode, user may experience no connection, no COM3 or something. Because device must be unplugged in USB, power-up in state 4 = DOWNLOAD mode, plug in USB, "new device detected" installing = RE-ESTABLISH, done. UNPLUG USB, replug in usb, then COM3 appears FLASH will be succesfull.

same goes for other state.

p.s. many users reported BRICKed but then recovered WITHOUT JTAG is misleading beginners, hence should rename the term to ???CRASH??? or ???HANG???. although some previously use "SEMI-brick", which is acceptable.

stage 3 = ClockWorkMod flashing (super convenient, especially on the move without PC)
stage 4 = Odin / Heimdall both works (still convenient and easy :) )
stage 5 = Odin / Heimdall both works (still convenient and easy :) )

???CRASH??? or ???HANG??? or "SEMI-brick" is usually SUCCESFULLY recovered via restock+PIT

(final disclaimer, incase above is correct and help and is copied, pls correct whatever mistakes found, feel free.)

*** Thanks for all those who taught me my mistakes *** devs and fellow forumers
 
Last edited:

spacemoose1

Inactive Recognized Developer
Dec 16, 2010
366
1,151
Bowling Green, KY
www.robotmegacorp.com
This is cool, but I would recommend trying to go through Samsung first if you are still under warranty. I screwed up my primary bootloader and contacted them. They took care of shipping costs, fixed it up, and sent it back in about a week and a half. If Samsung hadn't fixed it I would defiantly have payed the $50 here though.

Yeah, warranty repair is always a better choice. But sometimes you've already voided the warranty, lol.
 
Last edited:
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spacemoose1

Inactive Recognized Developer
Dec 16, 2010
366
1,151
Bowling Green, KY
www.robotmegacorp.com
Hi spacemoose1

Thanks for link and as always, thanks for honeycomb port. I would like to ascertain the definition of BRICK? with your help, if I may.

(disclaimer: pls forgive my wrong terms or exagerated explanation, but most importantly, pls correct me if I'm wrong)

BRICKed = software total lost, must use JTAG to force revive it, Samsung has it, or buy from web supplier around 300 USD ??? 500 USD ???

JTAG is a device to push software into all newly borned IC. I.E. when factory make IC, it's empty software inside, hence has a special device to push voltage into all sections of the IC, then force the code in.

Another term is ???CRASH??? or ???HANG???, (I don't know) anyway is not BRICKed, hence a reflash can recover it.

Samsung uses proprietary method a lot, not follow conventional, make usb driver very complex. USB driver install EXE around 15MB to 28MB depends on version, ALL work the same.

but, when the device = sgt7 in different state/condition, the driver must RE-ESTABLISH again, or else cannot work.

I.E.
state 1 = "OPERATIONAL"device in android operation, normal use, surf web, phone call etc
state 2 = "SLEEP" device powered off, show battery big icon charging when powered by charger
state 3 = RECOVERY mode
state 4 = DOWNLOAD mode - this is one of the way to FORCE flash to recover, as long as bootloader and something still intact
state 5 = PHONE-!-PC mode
stage 6 = "COMA" device powered off, NO show of battery big icon, even when charger supplied. Don't panic, let it charge fully 4 hours from 2 amperes supply, 10 hours from PC 500mA. It will start again !!!. Battery big icon will appear around 30% battery charged, I know because that's what I saw. I didn't check when it's in 10% or 20%. The 1st time I check was already 30% up from no-boot or no respone.

User need to plug device into PC during each of the state above at least once, in order for various flashing functions to work.

i.e. when it's a newly arrived device, usually install the usb driver 1st, with device state in android OS running properly, then plug in to USB and see "new device detected" installing, pls wait. Finished.

But when flashing via Odin using state 4 = DOWNLOAD mode, user may experience no connection, no COM3 or something. Because device must be unplugged in USB, power-up in state 4 = DOWNLOAD mode, plug in USB, "new device detected" installing = RE-ESTABLISH, done. UNPLUG USB, replug in usb, then COM3 appears FLASH will be succesfull.

same goes for other state.

p.s. many users reported BRICKed but then recovered WITHOUT JTAG is misleading beginners, hence should rename the term to ???CRASH??? or ???HANG???. although some previously use "SEMI-brick", which is acceptable.

stage 3 = ClockWorkMod flashing (super convenient, especially on the move without PC)
stage 4 = Odin / Heimdall both works (still convenient and easy :) )
stage 5 = Odin / Heimdall both works (still convenient and easy :) )

???CRASH??? or ???HANG??? or "SEMI-brick" is usually SUCCESFULLY recovered via restock+PIT

(final disclaimer, incase above is correct and help and is copied, pls correct whatever mistakes found, feel free.)

*** Thanks for all those who taught me my mistakes *** devs and fellow forumers

I pretty much agree, but I might refine:

BRICK= Unit does not power up, visibly charge, reach a boot-screen of any kind including a service or "download" screen. A device in this state requires service from the manufacturer or an individual equipped with the proper tools. There is no other way to recover a device in this state.

SOFT-BRICK= Unit powers up, reaches a "download" or service screen, visibly charges but does not boot into an OS. Crashing, hanging etc. all apply here. It is easy to recover a device from this state so long as one has access to a firmware that was designed for the device and the ability to flash said firmware.

SEMI-BRICK= See soft-brick above

JTAG= Provides access to system hardware by applying the correct voltage to the correct pins in order to push software via an external program.

In regards to the usb drivers, there are only actually 4 states
1. Active userspace
2. Serial gadget mode
3. Recovery
4. USB storage mode

And there is a separate driver for each of these (except recovery) in the Samsung driver package that should install automatically when the device is plugged in during normal use on a stock rom, or with the installation package available on the web.

The rest of it you've got pretty much correct. :)
 
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StarLog

Senior Member
Apr 29, 2008
792
76
Orlando, FLA.
Money seems right, but the amount of work that guy has to go thru is amazing, so much to tare it apart, and reassemble. Then again when it is put back toether, he checks it, what if it did not take the fix... all over again.
 
Jan 16, 2011
24
7
Hardbricked Tab Save by Mobile Tech

I hardbricked my galaxy tab bought in Cambodia. My little brother open the tab trying to take the battery off and put it back on, thus void the warranty, found him on the Samsung vibrant forum, sent the tab to him got it back good as new. This person is professional, honest and good communication with his customers, you'll be happy with his work, if he can't fix it you get your money back (minus shipping and diagnosis)...Glad he is arround to help...
 

alexgogan

Senior Member
Feb 10, 2011
332
26
Dublin
www.gogan.com
I pretty much agree, but I might refine:

BRICK= Unit does not power up, visibly charge, reach a boot-screen of any kind including a service or "download" screen. A device in this state requires service from the manufacturer or an individual equipped with the proper tools. There is no other way to recover a device in this state.

SOFT-BRICK= Unit powers up, reaches a "download" or service screen, visibly charges but does not boot into an OS. Crashing, hanging etc. all apply here. It is easy to recover a device from this state so long as one has access to a firmware that was designed for the device and the ability to flash said firmware.

SEMI-BRICK= See soft-brick above

JTAG= Provides access to system hardware by applying the correct voltage to the correct pins in order to push software via an external program.

In regards to the usb drivers, there are only actually 4 states
1. Active userspace
2. Serial gadget mode
3. Recovery
4. USB storage mode

And there is a separate driver for each of these (except recovery) in the Samsung driver package that should install automatically when the device is plugged in during normal use on a stock rom, or with the installation package available on the web.

The rest of it you've got pretty much correct. :)

You should post this in Q/A thread on its own as its very helpful and maybe it will stop the 1% of people saying help my phone is bricked comments ... the other 99% don't read anyway otherwise they would discover their phone isn't bricked and if they read properly it would not have gotten to the state in the first place .. and no I never posted something like that myself >:¬}

but well done on this..
 
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k0sh

Senior Member
Mar 24, 2011
2,338
461
Galaxy World
play.google.com
You should post this in Q/A thread on its own as its very helpful and maybe it will stop the 1% of people saying help my phone is bricked comments ... the other 99% don't read anyway otherwise they would discover their phone isn't bricked and if they read properly it would not have gotten to the state in the first place .. and no I never posted something like that myself >:¬}

but well done on this..

+1

Sent from my GT-P1000 using Tapatalk
 

ipit

Senior Member
Nov 29, 2010
549
142
$50 for that much work is an absolute bargain! I wish I didn't live in a country where you get charged $200/hr for someone to pick their nose.
 

LycaonX

Member
Sep 17, 2007
28
0
It's actually not that much more difficult than popping an OS install CD into a hosed computer and pressing 3 keys to let it run through the installation after flashing a corrupt motherboard BIOS. Yes, it takes familiarity with the software and hardware, but it's by no means a feat that requires a special skillset.

Granted, few people have JTAG stuff handy, so $50 is definitely worth it if you've hosed your device, but don't make it sound like he's sweating and coding the bootloader by hand, strenuously manipulating micro tools to disassemble the tablet and flipping DIP switches to restore the bootloader. You spend 5 minutes taking apart the tablet, you attach the JTAG cable, run the supplied software on your computer, and sit there recording the screen with your video recorder while the progressbar moves from 0 to 100.

Again, it's worth $50 simply because not everyone and their mother has JTAG hardware sitting around, but by no means is it hard. It's the same reason I can get away with charging $100 to clean viruses off of a computer. People either don't have the tools or don't know how to use them. That being said, I don't know a damn thing about using JTAG to restore a corrupt bootloader, nor do I have the right hardware, so I'd pay $50 if I were ever in the situation.

Edit: And yes, $100 for a virus clean is a lot, but people generally change their mind when I explain to them why they got viruses, as well as installing proper antivirus software and then instructing them on how to avoid infection in the future. I rarely get repeat business from the same customer but I get A LOT of referrals ;p They're happy paying that much when the person educates them instead of cleaning, not installing/explaining, then having to bring the computer in again two weeks later for another wallet-gouge, which most other computer 'repair people' gladly do over and over.
 
Last edited:

btyork

Senior Member
Apr 16, 2010
1,267
173
Texas
Everything in this world is rinse and repeat... The money comes from time spent learning to use the hardware properly, micro soldering skills (which isn't easy, no matter who you are), confidence enough to offer it as a service, not to mention the couple hundred bucks for the jtag software and hardware.

Now, the fact that if you have your device in a bricked state you likely voided the warranty, it's a 600 dollar brick if your samsung tech recognized it... 50 bucks is a steal to not deal with samsung anyway.

Try to be less pompous next time oh savoir of the hundred bone virus... Your poop stinks too, promise.

Sent from my "better than an iPad" tab running Overcome Hermes.
 

connexion2005

Senior Member
Feb 27, 2009
1,021
718
Texas
www.mobiletechvideos.com
It's actually not that much more difficult than popping an OS install CD into a hosed computer and pressing 3 keys to let it run through the installation after flashing a corrupt motherboard BIOS. Yes, it takes familiarity with the software and hardware, but it's by no means a feat that requires a special skillset.

Granted, few people have JTAG stuff handy, so $50 is definitely worth it if you've hosed your device, but don't make it sound like he's sweating and coding the bootloader by hand, strenuously manipulating micro tools to disassemble the tablet and flipping DIP switches to restore the bootloader. You spend 5 minutes taking apart the tablet, you attach the JTAG cable, run the supplied software on your computer, and sit there recording the screen with your video recorder while the progressbar moves from 0 to 100.

Again, it's worth $50 simply because not everyone and their mother has JTAG hardware sitting around, but by no means is it hard. It's the same reason I can get away with charging $100 to clean viruses off of a computer. People either don't have the tools or don't know how to use them. That being said, I don't know a damn thing about using JTAG to restore a corrupt bootloader, nor do I have the right hardware, so I'd pay $50 if I were ever in the situation.

Edit: And yes, $100 for a virus clean is a lot, but people generally change their mind when I explain to them why they got viruses, as well as installing proper antivirus software and then instructing them on how to avoid infection in the future. I rarely get repeat business from the same customer but I get A LOT of referrals ;p They're happy paying that much when the person educates them instead of cleaning, not installing/explaining, then having to bring the computer in again two weeks later for another wallet-gouge, which most other computer 'repair people' gladly do over and over.

I've got to call you out on this one. Mis-connecting or shorting any wires will lead to a damaged PCB and an un-resurrectable TAB. I'm also a Systems Admin for a living so I understand where you are coming from. You must realize that I solder at levels of .1mm in spacing on the Captivate, Vibrant and Nexus S. Electrical engineers and technicians have first hand talked with me about the difficulty of doing this and is NOT something that anyone can do. You'd think twice when you burn up a phone or two valued at $500 a pop trying to JTAG them. There is more skill involved than you would think. Not to mention the liability when dis-assembling the device. JTAG software is decent but it's not fully automated. There are TCK frequencies, RTCK frequencies different PBL partition sizes, full dcc loader read/writes and the requirement of EXACT voltage from an external power supply that are needed in MANY cases. Plus, there is little to no support when fixing a device. This means that if you can't figure it out, nobody else is going to for you. I'm not trying to brag but yet point out that this isn't like plugging in your phone for an ODIN flash. I've taken hundreds of hours of time and 1000's of dollars to create what I feel is the most trusted JTAG authority online ANYWHERE. I greatly appreciate having the opportunity to help the community and enthusiasts in this community. If this was as easy as you are claiming, you could get JTAG hardware and a manual at Best Buy. I have to say you put it best when you said you don't know anything about JTAG... ;) Ok end of rant I was just a bit bothered by your post.

Ok with that being said, thanks for the personal testimonies and compliments. I will be here whenever anyone needs JTAG assistance in the future or around the forums to help answer Q&A when it doesn't require JTAG. Here is a Nexus S promo to realize how tiny some of these things are :)

http://www.youtube.com/watch?v=Ecp8jKmm48k
 

tubasteve

Senior Member
Oct 2, 2010
131
15
i would love to learn more on how to do stuff like this if i had moneyz. the .1mm ext.

not just for android but to make my own ish.

thanks for the awsome videos.
 

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  • 8
    Stumbled upon this a bit ago, a company called Mobile Tech is offering an "unbricking" service on all versions of the Galaxy Tab. At the time of this writing they charge $50. I have not used this service, am not in any affiliated with this company and cannot vouch for their work, so beware. Just thought someone out there might use this when other options aren't available.

    They have a nifty video up on youtube showing how they do it:

    3
    a company called Mobile Tech is offering an "unbricking" service on all versions of the Galaxy Tab.

    Hi spacemoose1

    Thanks for link and as always, thanks for honeycomb port. I would like to ascertain the definition of BRICK? with your help, if I may.

    (disclaimer: pls forgive my wrong terms or exagerated explanation, but most importantly, pls correct me if I'm wrong)

    BRICKed = software total lost, must use JTAG to force revive it, Samsung has it, or buy from web supplier around 300 USD ??? 500 USD ???

    JTAG is a device to push software into all newly borned IC. I.E. when factory make IC, it's empty software inside, hence has a special device to push voltage into all sections of the IC, then force the code in.

    Another term is ???CRASH??? or ???HANG???, (I don't know) anyway is not BRICKed, hence a reflash can recover it.

    Samsung uses proprietary method a lot, not follow conventional, make usb driver very complex. USB driver install EXE around 15MB to 28MB depends on version, ALL work the same.

    but, when the device = sgt7 in different state/condition, the driver must RE-ESTABLISH again, or else cannot work.

    I.E.
    state 1 = "OPERATIONAL"device in android operation, normal use, surf web, phone call etc
    state 2 = "SLEEP" device powered off, show battery big icon charging when powered by charger
    state 3 = RECOVERY mode
    state 4 = DOWNLOAD mode - this is one of the way to FORCE flash to recover, as long as bootloader and something still intact
    state 5 = PHONE-!-PC mode
    stage 6 = "COMA" device powered off, NO show of battery big icon, even when charger supplied. Don't panic, let it charge fully 4 hours from 2 amperes supply, 10 hours from PC 500mA. It will start again !!!. Battery big icon will appear around 30% battery charged, I know because that's what I saw. I didn't check when it's in 10% or 20%. The 1st time I check was already 30% up from no-boot or no respone.

    User need to plug device into PC during each of the state above at least once, in order for various flashing functions to work.

    i.e. when it's a newly arrived device, usually install the usb driver 1st, with device state in android OS running properly, then plug in to USB and see "new device detected" installing, pls wait. Finished.

    But when flashing via Odin using state 4 = DOWNLOAD mode, user may experience no connection, no COM3 or something. Because device must be unplugged in USB, power-up in state 4 = DOWNLOAD mode, plug in USB, "new device detected" installing = RE-ESTABLISH, done. UNPLUG USB, replug in usb, then COM3 appears FLASH will be succesfull.

    same goes for other state.

    p.s. many users reported BRICKed but then recovered WITHOUT JTAG is misleading beginners, hence should rename the term to ???CRASH??? or ???HANG???. although some previously use "SEMI-brick", which is acceptable.

    stage 3 = ClockWorkMod flashing (super convenient, especially on the move without PC)
    stage 4 = Odin / Heimdall both works (still convenient and easy :) )
    stage 5 = Odin / Heimdall both works (still convenient and easy :) )

    ???CRASH??? or ???HANG??? or "SEMI-brick" is usually SUCCESFULLY recovered via restock+PIT

    (final disclaimer, incase above is correct and help and is copied, pls correct whatever mistakes found, feel free.)

    *** Thanks for all those who taught me my mistakes *** devs and fellow forumers
    2
    Hardbricked Tab Save by Mobile Tech

    I hardbricked my galaxy tab bought in Cambodia. My little brother open the tab trying to take the battery off and put it back on, thus void the warranty, found him on the Samsung vibrant forum, sent the tab to him got it back good as new. This person is professional, honest and good communication with his customers, you'll be happy with his work, if he can't fix it you get your money back (minus shipping and diagnosis)...Glad he is arround to help...
    1
    This is cool, but I would recommend trying to go through Samsung first if you are still under warranty. I screwed up my primary bootloader and contacted them. They took care of shipping costs, fixed it up, and sent it back in about a week and a half. If Samsung hadn't fixed it I would defiantly have payed the $50 here though.

    Yeah, warranty repair is always a better choice. But sometimes you've already voided the warranty, lol.
    1
    Hi spacemoose1

    Thanks for link and as always, thanks for honeycomb port. I would like to ascertain the definition of BRICK? with your help, if I may.

    (disclaimer: pls forgive my wrong terms or exagerated explanation, but most importantly, pls correct me if I'm wrong)

    BRICKed = software total lost, must use JTAG to force revive it, Samsung has it, or buy from web supplier around 300 USD ??? 500 USD ???

    JTAG is a device to push software into all newly borned IC. I.E. when factory make IC, it's empty software inside, hence has a special device to push voltage into all sections of the IC, then force the code in.

    Another term is ???CRASH??? or ???HANG???, (I don't know) anyway is not BRICKed, hence a reflash can recover it.

    Samsung uses proprietary method a lot, not follow conventional, make usb driver very complex. USB driver install EXE around 15MB to 28MB depends on version, ALL work the same.

    but, when the device = sgt7 in different state/condition, the driver must RE-ESTABLISH again, or else cannot work.

    I.E.
    state 1 = "OPERATIONAL"device in android operation, normal use, surf web, phone call etc
    state 2 = "SLEEP" device powered off, show battery big icon charging when powered by charger
    state 3 = RECOVERY mode
    state 4 = DOWNLOAD mode - this is one of the way to FORCE flash to recover, as long as bootloader and something still intact
    state 5 = PHONE-!-PC mode
    stage 6 = "COMA" device powered off, NO show of battery big icon, even when charger supplied. Don't panic, let it charge fully 4 hours from 2 amperes supply, 10 hours from PC 500mA. It will start again !!!. Battery big icon will appear around 30% battery charged, I know because that's what I saw. I didn't check when it's in 10% or 20%. The 1st time I check was already 30% up from no-boot or no respone.

    User need to plug device into PC during each of the state above at least once, in order for various flashing functions to work.

    i.e. when it's a newly arrived device, usually install the usb driver 1st, with device state in android OS running properly, then plug in to USB and see "new device detected" installing, pls wait. Finished.

    But when flashing via Odin using state 4 = DOWNLOAD mode, user may experience no connection, no COM3 or something. Because device must be unplugged in USB, power-up in state 4 = DOWNLOAD mode, plug in USB, "new device detected" installing = RE-ESTABLISH, done. UNPLUG USB, replug in usb, then COM3 appears FLASH will be succesfull.

    same goes for other state.

    p.s. many users reported BRICKed but then recovered WITHOUT JTAG is misleading beginners, hence should rename the term to ???CRASH??? or ???HANG???. although some previously use "SEMI-brick", which is acceptable.

    stage 3 = ClockWorkMod flashing (super convenient, especially on the move without PC)
    stage 4 = Odin / Heimdall both works (still convenient and easy :) )
    stage 5 = Odin / Heimdall both works (still convenient and easy :) )

    ???CRASH??? or ???HANG??? or "SEMI-brick" is usually SUCCESFULLY recovered via restock+PIT

    (final disclaimer, incase above is correct and help and is copied, pls correct whatever mistakes found, feel free.)

    *** Thanks for all those who taught me my mistakes *** devs and fellow forumers

    I pretty much agree, but I might refine:

    BRICK= Unit does not power up, visibly charge, reach a boot-screen of any kind including a service or "download" screen. A device in this state requires service from the manufacturer or an individual equipped with the proper tools. There is no other way to recover a device in this state.

    SOFT-BRICK= Unit powers up, reaches a "download" or service screen, visibly charges but does not boot into an OS. Crashing, hanging etc. all apply here. It is easy to recover a device from this state so long as one has access to a firmware that was designed for the device and the ability to flash said firmware.

    SEMI-BRICK= See soft-brick above

    JTAG= Provides access to system hardware by applying the correct voltage to the correct pins in order to push software via an external program.

    In regards to the usb drivers, there are only actually 4 states
    1. Active userspace
    2. Serial gadget mode
    3. Recovery
    4. USB storage mode

    And there is a separate driver for each of these (except recovery) in the Samsung driver package that should install automatically when the device is plugged in during normal use on a stock rom, or with the installation package available on the web.

    The rest of it you've got pretty much correct. :)