AT&T Tab Black Screen/White Line During Bootup Fixed

[rangercaptain]

I took my stock AT&T tab and wiped it then flashed Roto JME-4. When I rebooted, I had a black screen for about 60 seconds, with a skinny white line, and I could hear the samsung music. After about 1.5 minutes, I pressed the power key, and screen went totally black - no line. Then I pushed power again, and everything was normal after that, unless I rebooted.

Anyway, here is it fix:

1) go to http://forum.xda-developers.com/showthread.php?t=899196 and download the jj4bootloader.zip file

2) use odin to flash the unzipped jj4 file. It goes in PDA and nothing else in any options.

3) upon reboot, you will have a 100% normal startup with logo and music.

I used the Bootloader Patch app to check this, and it reports it is safe, and that I can flash anything.


Thanks to Roto, Chain Fire, and alexnoalex

 

[Jade Eyed Wolf]

Ok, so, just to be sure I'm not going to break my Tab, doing this ONLY changes/fixes the boot animation etc. (get's rid of the AT&T stuff, and puts in the Samsung stuff).

To be clear, I just flashed Roto's latest Euro firmware (Baseband P1000XXJMA, Build FROYO.XXJME), so performing this fix won't affect/change ony of this stuff right?

If I have to re-flash everyting from scratch, then it's really more trouble than it's worth (Blank screen at bootup? Big deal... It's just at boot right? Everything else works perfectly!)

 

[GuestK0050]

I wish rotohammer and other rom devs would include this information clearly in their initial posts. Took me awhile to find this fix but it works well. This is also important because you can't see the recovery screen without it.

Sent from my GT-P1000 using Tapatalk

 

[rangercaptain]

If I have to re-flash everyting from scratch, then it's really more trouble than it's worth (Blank screen at bootup? Big deal... It's just at boot right?

This is just a quick 30 second flash thru odin, it only repairs the black screen, and doesn't touch anything else!

The developers took out the sound and logo to make the rom file size correct.

 

[Jade Eyed Wolf]

That's just the answer I was looking for! Thank you good sir!

 

[rangercaptain]

Glad I could help.

 

[starbuck123]

Hello, I have the same problem but I cannot flash the zip file because my computer doesn't detect the tab when I'm in download mode. I tried updating the drivers and software and it still doesn't want to detect it. I cannot get into recovery mode because of the black screen/white line. Do you know what I can do to get my computer to detect my TAB? I tried searching the forum but could not find any info that helped. Any help is much appreciated. Thanks!

AT&T SGH-i987
Firmware 2.2
Baseband P1000XXJHA
Kernel 2.6.32.9 [email protected] #19
Build Froyo.XXJMA

 

[rangercaptain]

Are you using windows xp, or 7? Put the tab in download mode before you connect to the computer. Is your tab set to usb debugging mode?

 

[starbuck123]

I used Win XP, Windows 7 x64 and x86, non of them worked. They can detect my Galaxy S I9000 phone but not my TAB. Yes, I tried it with both debugging on and off, it still doesn't work. Could it be the kernal's fault? Maybe the cable? It will charge the TAB but for some reason my computer won't detect it.

 

[rangercaptain]

Try different usb cables and ports on the computer.

 

[starbuck123]

I tried a different wire and usb ports and it's still not working. I just realized the TAB is not charging anymore. It doesn't make the charging sound when I plug it in. Figured out it's not the cable because it worked on another TAB. Could it be the firmware or kernal?

 

[rangercaptain]

Not charging when plugged in the computer, or in the wall outlet? Plug it in the wall for at least for hours to get a full charge.

 

[starbuck123]

It charges if I plug it into the wall but its very slow like when you charge it via usb. Im using the original charger and cable. There is an x next to the charging/lightening icon on the top when I plug it into the wall and computer.

 

[rangercaptain]

Just let it charge all night. Be sure its off when charging.

 

[starbuck123]

What's the point of having it fully charged? How will that help? My computer still won't detect it even if it's fully charged. I need help to get my computer to detect it so I can restore the original firmware.

 

[rangercaptain]

I have seen five problems like yours, and after a complete charge, then reboot the phone into download mode, the problem cleared up. They used a different usb port also.

Go to windows update and update your pc.

Look a few threads further down named «help help help»

 

[starbuck123]

Ok its currently 50% now. Ill let you know once its fully charged. Thanks for your help so far.

 

[starbuck123]

Its 100% and my computer still doesn't detect it. Now what?

 

[rangercaptain]

Did you have a chance to see the thread “help help help"?

This will sound crazy, but double check your cable - recently someone had the same trouble, because they had dust in the cable connector.

 

[starbuck123]

I cannot see the thread you're referring to.

Yes, I did tried a different cable and it's still the same.