[EVO 4G Q&A, Help & Troubleshooting] ramdom:
[Edit: I've now resolved this issue. Thanks to all who helped. Please see end of thread for my solution. I've made some edits below too. When things looked bad, the solution was to remove the microSD card, copy and load a more reliable PC36IMG.zip (there are a huge number out there), and only then could I use adb when the red triangle was present. Note that just renaming stuff randomly or worrying about the USB cable isn't a proper way to come up with a solution even though I did it also (and that may be the case for some units but it can't be the general problem or solution). I'd guess there's a huge amount of misinformation out there and some people may have tried random stuff but it looks like from playing with all this, there is a method to the madness of how phone and the adb communicate, as well as how the phone loads, and once you UNDERSTAND HOW that process, all this stops being so much of a black magic.

Note that the problem I had was because I used an outdated set of instructions. Here are the ones that worked for me in the end:

http://xdaforums.com/showthread.php?t=829045

Thanks to all who did reply to my message.

]

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I've tried literally everything I've read to get out of my red triangle situation so please help if you can. This is not your standard "hold volume up and power button" response.

I was trying to get to root using the method at evo4g.me.

And I got a red triangle after the first application of the PC36IMG.ZIP. I then held the volume up and power button and, I get a blue lettered screen with 4 options:

reboot system now

apply sdcard:update.zip

wipe data/factory reset

wipe cache partition

Well, I've seemingly tried everything but I can't seem to get past this screen. I've pulled the battery out and rebooted, I go back to the above screen. Option 1 above gets me back to the same spot. Option 2 says it can't find sdcard/update.zip. I did option 3 but it does that and turns off and on and comes back to this same position. Even when I try to hold the volume button down. When I try to access this using adb, I get "device offline".

I can take the battery out, hold the volume down button, and then power on, and it takes me the through the same steps as before and I don't seem to have control over the choice of whether it should load the PC36IMG.ZIP file or not (i.e., the menu I see before it doesn't to be controllable by me).

So I'm at a loss. I really would like to finish this process and get to root, which shouldn't be too hard in my view but here I am.

I could move the SD card elsewhere and put an update.zip file on there but I'm not sure what to do here exactly so I can recover (and hopefully with root). Is this the correct thing to be thinking about? Move the SD card to another device, replace the .ZIP file, and then go from there? Is there a way to do this without moving the SD card?

[Edit: this is indeed what I did in the end. I found the correct PCIMG.zip file by trial and error.]

Thanks a lot!

BTW, I backed up all my apps on my sdcard so I should be fine right? I'm not sure what I'd need to do reinstall them.

[Edit: I lost some public keys, etc. with app reinstalls but I just had too many apps doing backups in different places and wasn't matching the right app restore to the right location in part.]

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Backgrround: I'm new to the Evo 4G and in general new to doing stuff like rooting phones and the like, so please forgive me if my questions (or actions) or too naive. I have been using Unix systems all my life and Linux when there were fewer than 100,000 users of it (back in 1992-1993) and am extremely comfortable with it and do all my science (work) exclusively with Linux.