Stuck at yellow triangle boot screen. Help

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So my friend has been using this site for over a year rooting his HTC Desire and said I should look into rooting my S2, and because the S2 is quite a popular phone it should be an easy hack. So I obliged and downloaded Odin and used this file.\CF-Root-SGS2_ZS_OZS_KG2-v4.1-CWM4\CF-Root-SGS2_ZS_OZS_KG2-v4.1-CWM4.tar.

I put my phone into download mode, followed every step perfectly and it said the download was a success/pass. Now when I try to boot my phone back up it goes to the Samsung Galaxy S2 GT-I9100 screen, with a yellow triangle with an ! in the middle. And it wont boot anymore from there.

If this is an easy fix, or if there's an easy way to do this, I apoligize I'm a phone noob. Thanks for any help.

Originally Posted by JHolwell

So my friend has been using this site for over a year rooting his HTC Desire and said I should look into rooting my S2, and because the S2 is quite a popular phone it should be an easy hack. So I obliged and downloaded Odin and used this file.\CF-Root-SGS2_ZS_OZS_KG2-v4.1-CWM4\CF-Root-SGS2_ZS_OZS_KG2-v4.1-CWM4.tar.

I put my phone into download mode, followed every step perfectly and it said the download was a success/pass. Now when I try to boot my phone back up it goes to the Samsung Galaxy S2 GT-I9100 screen, with a yellow triangle with an ! in the middle. And it wont boot anymore from there.

If this is an easy fix, or if there's an easy way to do this, I apoligize I'm a phone noob. Thanks for any help.

1. make sure you're in the right forum for your device, and used the right file. What is your model number? (printed on the label under the battery)
2. where did you get that file? (CF-Root-SGS2_ZS_OZS_KG2-v4.1-CWM4)
3. did you make a note of what your original kernel version was before you began? (this may be too much to hope for)

Originally Posted by ctomgee

1. make sure you're in the right forum for your device, and used the right file. What is your model number? (printed on the label under the battery)
2. where did you get that file? (CF-Root-SGS2_ZS_OZS_KG2-v4.1-CWM4)
3. did you make a note of what your original kernel version was before you began? (this may be too much to hope for)

1.GT-I9100M
2.I followed this topic(post 5, im with bell). http://forum.xda-developers.com/show....php?t=1193695. Then i googled the firmware and downloaded from here. http://hotfile.com/dl/133784983/242e....html(probably where I screwed up <_<)
3.And I have no idea, sorry.

Yes, I am curious about this too; could this thread be of use?

http://forum.xda-developers.com/show....php?t=1103399

Thanks a ton!

Originally Posted by JHolwell

1.GT-I9100M
2.I followed this topic(post 5, im with bell). http://forum.xda-developers.com/show....php?t=1193695. Then i googled the firmware and downloaded from here. http://hotfile.com/dl/133784983/242e....html(probably where I screwed up <_<)

Yikes. That thread says:

CF-Root Thread: http://forum.xda-developers.com/show....php?t=1103399
We do not have a CF-Root version of our kernel so just flash any kernel using the instructions provided in the link and flash the stock kernel back (found below). Root will remain as well as the CWM app but you will loose clockwork mod recovery.

Which is very VERY vague, and is probably why it screwed up. You can't just flash ANY kernel - it has to be one close to the one you already have. For example, if you had ICS on the phone, and flashed an older Gingerbread kernel (which the one you downloaded is version KG2, is an older Gingerbread kernel build), then the phone wouldn't boot.

Originally Posted by JHolwell

3.And I have no idea, sorry.

If you didn't know what version you had, then there really isn't a way to recover without flashing a whole firmware.

Download an I9100M firmware from http://samsung-updates.com/device/?id=GT-I9100M and flash that to get back to ICS. Then go back to the CF-root thread, and make sure to read the instructions in post 1. Pay particular attention to the part that says "Help! Which file do I use ?"

2.6.35.7-19100mugkkg2-cl371789dh1130.y00 (oo)@sep-48#2 . That is the default kernel for the phone

Originally Posted by Joshua3109

2.6.35.7-19100mugkkg2-cl371789dh1130.y00 (oo)@sep-48#2 . That is the default kernel for the phone

Only if the phone shipped with the UGKG2 build (you have one too many "k"s in there) of Android. (which isn't guaranteed).

Ok so I have that file downloaded, and I downloaded the correct file from that site. Now I'm trying to install the firmware onto my phone, but its in MD5 format, and not .TAR. I tried googling how to fix this but couldnt find anything, how would I go about changing the file so that Odin can pick it up?

Originally Posted by JHolwell

Ok so I have that file downloaded, and I downloaded the correct file from that site. Now I'm trying to install the firmware onto my phone, but its in MD5 format, and not .TAR. I tried googling how to fix this but couldnt find anything, how would I go about changing the file so that Odin can pick it up?

Odin should pick up an md5. Mine does. Put it in the PDA box and leave everything else alone.

Okay it's back to how it was before I tried to hack my phone. Thanks for the help!