[Q] SOD On Multiple Roms- Hardware Problem?

New to posting here but I have been lurking for quite some time. I'll keep it brief here.

Suddenly, since flashing a 5.1.1 ROM, my N5 has been experiencing a sleep of death issue. Namely, once the screen turns off, it does not respond to anything. Pressing the power button does not wake the phone, and neither does plugging it in. After some time (~1 minute), the phone will reboot itself.

I know that this is not an uncommon issue, but the reason I have been forced to query the forums is because I have been unable to solve it by flashing ANY other rom. I've tried 5.1.1, 5.01, 5.0, and 4.3.3. I've searched and searched these forums and others to no avail. I've done countless restores to stock firmwares and 3rd party roms alike, removed apps and added them again, but nothing has solved my issue. I'm beginning to wonder if it is a hardware problem- that would be truly tragic.

I've pulled a kmsg but cannot attach it here as I have never posted, so I pulled a line that I believe is of interest, and would really appreciate it if you guys would look over it and tell me what you think.

Thanks!

KMSG

Code:

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msm_vfe40_process_error_status: violation
[ 1066.509891] msm_vfe40_process_violation_status: camif violation
[ 1066.710201]

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