We appreciate that you aren't new to the android platform or to the galaxy-line. Regarding the i777, you are in good company, and if we know NOTHING about any other device, we know the i777 very well. We're here to help.
You mentioned that you flashed several recoveries to the device. For future reference, the recovery for the i777 is packaged with the kernel, and is not installed separately. Even the often-troublesome temporary flash-recoveries that can be found, are actually a kernel/recovery combination. The s959g (straight talk's s2) has the same partition layout as the i9100 and i777 (and several other s2's), and DOES use a separate partition for recovery.
The fact that desktop ODIN indicates PASS when the flash is complete tells us that all of the factory nand images flashed successfully (including boot). It is very common that the device needs to have the factory data reset even after the factory images have been installed via desktop ODIN, but of course that requires access to recovery. If after a successful factory flash, the vol+ & vol- & power button held-concurrently-until-recovery (<--while NOT plugged into a USB port)
truly doesn't get you to recovery, then that would be a new one for me as well; all other signs (as you have stated them) point to a correctly functioning device.
I'm hesitant to point you to flash a custom kernel;
there's some unnamed part of the procedure affecting the process, and flashing another boot image won't be helpful
there's a hardware failure, and flashing another boot image won't be helpful
you're using an incorrect method to get to recovery, and flashing another boot image won't be helpful
If you want to try it anyway, custom_kernel_twrp_v126.96.36.199.tar
file via desktop odin might be worth a try.
^^this will trip the flash counter
^^this will install any custom firmware, but will not boot anything below android 4.4.x
I apologize for the hijack @creepyncrawly
Originally Posted by Berthfield
Okay. I am a student who repairs phones part-time, I am not new to the android platform or to the galaxy line however this is the first I am experiencing this particular problem.
This phone is a unlocked and refurbished device that was purchased recently by my cousin. He claims he was just installing an app when it shut down and refused to boot back up. I initially took it with the intentions of wiping the data and returning it, however I was unable to access the recovery menu.
As I had no idea what rom was on it before, other than the fact that it was a samsung original, I proceeded to trying to flash various recoveries hoping that one would load from which I could install a custom rom. Failing that I then went on to flashing the I777UCKH7 firmware which also failed to boot and/or access recovery. Unsure what to do next I then attempted to flash the I777UCMD8 firmware which also did not boot. I then made a second attempt at flashing the I777UCKH7 firmware and .pit file from your download repository which also failed to boot.
All were loaded using Odin versions 1.82, 1.83 or 1.85 (Mostly 1.85). They all returned a "Pass" status but would be stuck on the "Samsung" screen when they rebooted. It was at this point having run out of ideas that I made the O.P.
I have also tried leaving the battery out and then following your instructions for recovery, when I do so I get a black screen. If i leave it in that screen for some time (approximately 5 mins) it will reboot and again be stuck on the "Samsung" screen.