Question No boot, Bios wont start, No monitor signal

[brianosaur]

Win10 went to BSD frowny-face 'Your pc ran into a problem..." and shut down on me.

I attempted to restart several times, but it refused to boot or even give me a mobo splash screen. After many restarts I got into bios, once, and saw my o/s drive wasnt showing up.

I tried restarting again, but it has since refused to display anything since then. My monitor states "no signal present".
I removed the mobo battery, reset/shorted the CMOS jumper several times, but still dead screen.

I pulled the gpu, all drives, reset cmos again, reseated all cables and tried plugging the monitor directly to mobo's onboard video HDMI port. Nothing. No bios. Dead black. No monitor signal.

Mobo lights are coming on, CPU fan is running, and the GPU had been lighting up & fans spinning when it was in.

Is the Mobo dead?

Build is 8 months old and been running well until this crash out of nowhere.

 

[KingBoodah]

It may very well be a bad motherboard. Did you reseat the ram into the alternate slots? A1/b1 A2/B2

 

[brianosaur]

I hadnt, but did as you suggested. It did boot to bios but I saw only dimm_A2 was present. I realized I didnt seat B2 all the way any tried again. Nothing. Dead screen.

I pulled B2 and restarted with only 1 stick. It now loaded bios.

Swapped sticks. Nothing.
Thought bad stick?

Swapped back. Tried good stick again in all 4 dimm slots.

Back to nothing again.

Bad mobo?