Area 51m R1 - No power, diagnostic support?

Hello,

Yesterday evening I sat down with my Area 51m and to my surprise, it wouldn't turn on. The laptop has worked great for years, and I had been using it just a couple of hours earlier without issue. If there was any warning sighs leading up the the issue, they weren't obvious. I repasted the heatsync several months ago and have an undervolt configured on both the CPU and GPU. I constantly monitor temps and haven't hit any thermal limits for months.

The system seems to completely lack any power. Pressing the power button does nothing. When I plug in the power adapters, no charging lights come on. The USB ports are not providing any power. I haven't got too far into diagnosing the issue, but these are the steps I've taken so far:

• Tried each power adapter separately and together, and ensured to test each power port individually.

• Tried a different power outlet.

• Tested a separate 240W Dell power adapter

• Drained Flea power.

• Opened the laptop to check for loose cables or wiring with no remarkable findings (I only got as far as removing the bottom cover, IO cover, and battery; admittedly there are a couple of more cables I could access if I removed the heatsink but I haven't had time to get that far down).

• Unplugged and replugged the power button ribbon

• Tried booting with both AC adapters plugged in the and the battery disconnected.

I am a bit lost as to how I should proceed. Has anyone experienced this issue on the R1 and, more importantly, were you able to resolve it? Any other trouble shooting tips for me? Thanks!