About 4 years ago I bought an Asus M4A785TD-M Evo motherboard to go with my AMD Phenom Quad Core CPU, Sapphire HD5770, 4GB of Corsair XMS3 RAM and Corsair 950W PSU. When I first got it and put it together everything worked well - for about 4 months when the ethernet port on the motherboard stopped working. I really couldn't be bothered to send it back so I put in a spare ethernet card I had lying around.
About a year in I decided to clean out the PC. The graphics card was blocking direct access to the rear fan so I took it out and proceeded to clean. Upon putting the graphics card back in I found it I wasn't getting any video. So I tried moving it about a bit but got nowhere. I then remember removing the graphics card completely and trying the motherboard's display. That didn't work so I out the graphics card back in, moved it about a bit and eventually got it working. I think I went through this same motion once before.
Anyway, today I decided to move all the components into a new case. I placed everything in and connected the monitor to the graphics card. No display. I tried reseating the graphics card and still no display. There's no display on the motherboard's display either. Both the 4 pin power connector and the larger power connector (16 pin?) are in place and have been reseated quite a few times. I've tried 4 separate sticks of RAM in various slots and that didn't work. I don't have a motherboard speaker so can't tell if it's posting or not but I have tried logging in to windows blind a few times and I dont get the logon sound playing. I've also tried the above again after resetting the CMOS.
I also just noticed that my keyboard and mouse aren't receiving power after turning the PC on - the optical mouse's LED isn't on and the caps/num lock LED of the keyboard doesn't work. I've tried various USB ports on the back and they didn't work. When I connected the mouse to the front USB of the case the optical LED flashes on for a second and then no more.
So, is my motherboard borked?