What should happen if you try to power a P8Z77-V Pro on with no CPU/RAM/video card?
Current behavior:
With absolutely everything unplugged (no CPU, no RAM, no nothing) except for motherboard power and the power switch (with the green standby LED on, indicating the motherboard has power), when I hit the power button, the power supply and CPU LED briefly come on, and then immediately shut off. After a few seconds, the same thing happens, and this repeats until I disconnect power (via the switch on the power supply).
I suspected this was a power supply problem, but I measured 24V on my power supply, and I get the same behavior with a brand new power supply.
Prior to removing the CPU, I tried removing the video card, all the RAM, using one RAM stick at a time, etc. with no change in behavior.
Background:
This computer had been working fine for a while. I put it in standby one morning, and then when I came back it was running, but I wasn't getting any video. I tried rebooting and never saw it POST. Initially, I suspected an issue with the video card or video cable, but switching cables and using onboard video made no difference.
After that, I started to suspect a BIOS issue, so I tried resetting the CMOS memory, reseating the CMOS battery (which I measured at ~3.1V), pushing MemOK , etc. I also removed the motherboard from the case, in case there was a short, but that didn't help either.
I was getting inconsistent behavior (sometimes the DRAM LED would be on, other times not). Eventually, I got into the infinite reset loop described above, and I've never been able to get back out of that loop.
From other threads I've found, it sounds like the motherboard is probably toast, but I saw at least once person claim it was a CPU issue. Is it plausible that a CPU issue would cause this motherboard to go into this bizarre reset loop?
I'm leaning towards replacing the motherboard next, unless anyone else has ideas, but I'll be pretty annoyed if it actually ends up (somehow) being the CPU.
Current behavior:
With absolutely everything unplugged (no CPU, no RAM, no nothing) except for motherboard power and the power switch (with the green standby LED on, indicating the motherboard has power), when I hit the power button, the power supply and CPU LED briefly come on, and then immediately shut off. After a few seconds, the same thing happens, and this repeats until I disconnect power (via the switch on the power supply).
I suspected this was a power supply problem, but I measured 24V on my power supply, and I get the same behavior with a brand new power supply.
Prior to removing the CPU, I tried removing the video card, all the RAM, using one RAM stick at a time, etc. with no change in behavior.
Background:
This computer had been working fine for a while. I put it in standby one morning, and then when I came back it was running, but I wasn't getting any video. I tried rebooting and never saw it POST. Initially, I suspected an issue with the video card or video cable, but switching cables and using onboard video made no difference.
After that, I started to suspect a BIOS issue, so I tried resetting the CMOS memory, reseating the CMOS battery (which I measured at ~3.1V), pushing MemOK , etc. I also removed the motherboard from the case, in case there was a short, but that didn't help either.
I was getting inconsistent behavior (sometimes the DRAM LED would be on, other times not). Eventually, I got into the infinite reset loop described above, and I've never been able to get back out of that loop.
From other threads I've found, it sounds like the motherboard is probably toast, but I saw at least once person claim it was a CPU issue. Is it plausible that a CPU issue would cause this motherboard to go into this bizarre reset loop?
I'm leaning towards replacing the motherboard next, unless anyone else has ideas, but I'll be pretty annoyed if it actually ends up (somehow) being the CPU.