Here's some info:
We had some thunder and lightening a few days ago. A loud crack happened outside but in the same direction as the PC.
The PC was on "sleep" mode.
I noticed within 10 mins the PC was on. So I checked on the TV and it said "no signal". We also lost TV signal. I pressed and held the power button and the PC turned off.
The next day, TV signal returned.
I tried the PC, it starts, the hard drives load some things but I don't think Windows loads, but I can't really tell as the screen still says there is no signal.
Using a HDMI cable, integrated motherboard port.
I haven't yet opened it to see if everything looks okay but any guesses?