New
#1
Machine sometimes will/sometimes won't POST
Intel i7 4790K
Asus Z97K/CSM
16 Gigs Corsair Vengeance LP
EVGA Supernova 750 G2
Onboard video only
Not sure what's going on, but for some reason this machine will POST and boot perfectly fine, other times it'll act like it's going to POST, but no video for the ASUS BIOS screen at all. The optical mouse light turns on. The USB devices I notice turn off then on. A FireWire audio interface I have hooked to this gets the signal from the FireWire PCIe card I got that it's attached ok (it'll switch from blinking to solid on the interface.) The hard drive light will blink a few times, then the machine will just sit there. I tried detaching everything from the USB ports and even the video to see if the behavior will change. It's booted a few times when I just had the 15 pin DSUB attached to the onboard video (there is no dedicated video card in this PC.) When I press power, it immediately turns off, but if it has booted, it'll shut down properly, but takes it a second to complete shut down. So overall, it acts like it's starting POST each time, but sometimes video will start, other times not. Bad PSU? I haven't torn into it yet.
D