I am troubleshooting an issue I've had for about a year. System runs stable 90% of the time. But then it fails on boot. Symptoms of issue: Boot and Red POST Light comes on, Then yellow POST like comes on. After a bit Red, then yellow. This repeats for a while. Then both are off. System hangs there no HDMI signal screens dark.
Fix - Reload BIOS from USB using flash button - System then reboots, and comes up stable.
Troubleshooting
Replaced RAM
Reset RAM
Ran with one stick or two
Reseat GPU
Unplug Power each night
Reset CMOS switch (which causes it to pass Post and comes up to Load BIOS screen, if I F5 and Save exit, it goes right back into this Red/Yellow loop and hangs again.)
System runs fine for a random number of days - through both Shut Down and Boot Sequence. Then after shutdown, the next boot it hangs again - Have to flash BIOS again, which fixes it for a while.
Any suggestions?
