This build has been a weird ride. Everything worked fine for the first month, then it started simply turning off after running a few hours. Quickly after this was noticed it started turning off after only 30-90 seconds (even after sitting long enough to cool down if temp was the issue). Then it would just flash tower lights and not even get to the bios screen. I got busy and let it sit a few weeks, just confirming it still wouldn't turn once a week or so. Had the power source tested and it was fine. Took the machine home, plugged it in and everything worked fine again. Full boot and ran for hours. Tested temperature and well within normal range. Thought I was good to go.
Within a few hours after working again, when I shut down the computer everything would shut down except for the case fans and lights, which would stay on until I flipped the physical switch on the power source to off (tested if several times where the fan and lights were on for 30 minutes after attempted shut down). That lasted for a few days until it spontaneously stopped happening.
Now the power button on the front of the tower turns everything off, but it is acting strangely in that it immediately turns off the computer upon being pressed, without having to press the button down for several seconds as is normally the case (note that it just shuts down, not a reset; the reset button still behaves normally). But more problematic and my real issue is the fact that the computer wont boot past the bios screen and wont let me go to the setup screens. This series of errors and spontaneous fixes is messed up. I’d appreciate some input on possible causes/fixes.
Asrock Z77 extreme 4
Cx500 (checked out fine using power source tester)
1tb sata HD
OCZ VTX4 SSD
Radeon HD 7850 2GB 256 bit
2x 4gb ram
Win 8 64bit (not my smartest decision ever)
debug codes I get on start up and reset: 4F, 62, 99, A2
Not the major issue but might be contributing to inabilty to reach bios screen (i.e. f2/del does nothing) is my input. Been trying to use the wireless keyboard that had worked when computer was booting. Tried to change port the wireless receiver is in and get a d7 no input found code. I get the same d7 code when i try a mechanical keyboard attached via usb (same when try it in various ports). Wondering whether i don't need to try a more low tech wired keyboard at least to reach the bios screen.
AHCI is enable for SSD?. hit F10 and then enter if you have to ssd for 1st boot.
what's happening now?
Ran the internet flash option to flash bios but it didn't seem to cause any change. Date and time still correct, seems to be normal. Sata mode selection is set to AHCI. Woah, f10 then enter from within the bios menu does cause it to boot up! Has shut down and rebooted normally twice now without any need to go to the bios menu! What did we just do?
normally, F10/enter would have saved your new settings in the BIOS and the machine would have rebooted.
perhaps the BIOS update needed a couple of reboots to take? or it didn't help and the BIOS is screwed?..,
what's going on now?
Flashed bios because i hadn't seen your reply and had seen it mentioned as a step others had taken with boot issues. Was fiddling to see what might happen. Just wanted to let you know what i'd done. Interesting that f10 just saved settings in that i hadn't changed any sata settings. It was already set to ahci. Anyway, it seems to be running fine now. Restarted one more time and am now running a prime95 stress test and temps seem well within normal ranges. Going to stress test my video card and ram next. If you can think of any other diagnostics or stress tests to run I'm happy to try them out.
Huge thanks for taking the time to help me with this. It's been great to get feedback and direction.