P7P55D-E PRO won't POST, SB Power LED on, power button does nothing, fans don't spin

[maximusprimate]

Let me start by clarifying that although my computer is a hackintosh, this is not a hackintosh related question - if it was I would consult TonyMacx86.com as I usually do. I am quite sure this is strictly a hardware issue, and am (in a strange way) pleased to enter this forum that I've often searched for solutions to problems I've had in the past. Anyways...

The other day I put my computer to sleep - I had ioQuake3 playing in OSX, paused it, and used a keyboard command to put the computer to sleep for the night. I came to it the next morning and pressed the spacebar to turn it back on. The fans kicked in, but there was no power to the monitor or my mouse (the mouse's LEDs weren't on). Since it's a hackintosh, this kind of wake from sleep behaviour isn't unusual (although it has been running perfectly in that respect for years) so I force powered off after a few minutes of waiting around and pressing keys on the keyboard. Now it won't turn back on. The Standby Power LED on the motherboard is on, but the power button seems to do nothing, and the MemOK! button does nothing as well. When I say nothing, I mean nothing. No fans, no lights other than SBP, nothing.

My specs:

Spoiler

• 
  ■ Asus P7P55D-E PRO motherboard
  ■ Intel i7-860 CPU
  ■ 1 SSD with Chameleon bootloader and OSX 10.10.3
  ■ 1 SSD with Kali Linux
  ■ 1 HDD with Windows 8.1
  ■ 1 HDD with just data
  ■ A DVD drive, I forget the brand/model
  ■ 2x HD6870 GPUs in SLI
  ■ 4x 2GB G.Skill Ripjaws modules
  ■ TP-Link TL-WDN4800 wifi card
  ■ Corsair HX850W PSU
  ■ Modded PowerMac G5 case (note: no mobo speaker)
  ■ CoolerMaster CPU cooler (Hyper 212??)
  ■ Some Noctua fans
  ■ Apple Cinema Display (mini displayport)
  ■ A few external HDDs

Here's what I've done. When I say "nothing" below, I mean the power button doesn't do anything, and the memOK button doesn't do anything (at least once the case is open). No fans, no LEDs other than the Standby Power LED, which is on the whole time.

■ I pressed the power button a few times. Nothing.
■ I opened the case and inspected the components and connections. Check.
■ I unplugged all unnecessary peripherals except the monitor. Nothing.
■ Unplugged the monitor. Nothing
■ Unplugged all drives and cables (incl. DVD) except the boot drive. Nothing.
■ Unplugged the boot drive. Nothing.
■ Unplugged the graphics cards, and tried each one in each slot. Nothing.
■ Unplugged the wireless network card. Nothing.
■ Unplugged all RAM modules, and tried each one in each slot. Nothing.

========================================
At this point all that was connected to the MB was the PSU, one RAM module, and the CPU.
========================================

■ I noticed the RTC battery. Took it out, cleaned it, replaced it. Nothing.
■ Went to the store and got a new CR2032 to replace said battery. Nothing.
■ Cleared RTC RAM. Nothing.
■ Replaced the CPU fan with one of the noctua fans with 4 pins. Nothing.
■ Asked my friend to borrow his PSU. Plugged it in, still nothing.
■ Unplugged the power button and headers, used a key to short circuit the power. Nothing.

The whole time, the SB power LED is on, and when I switch the DRAM overvoltage setting switch works, that is, the red LED will turn on when I switch it on.

My guess is that the motherboard is working okay, but the CPU is fried somehow. But would a fried CPU prevent the motherboard from blinking any lights and POST? And if it's the motherboard that is broken, why is the SB Power LED on?

I would really really appreciate somebody else's two cents on this one. I feel like I've really done every trick in the book to locate the problem, but I have... Nothing.

 

[Saga Lout]

You clearly know our views on hackintosh machines so you won't be surprised our system has flagged up your thread. The Moderators will be keeping a close eye on this one, more particularly since you just created this new account while having started an account yesterday.

Whilst not (yet) against our Rules of Conduct, we have to wonder why someone would wish to have more than one account.

 

[maximusprimate]

You clearly know our views on hackintosh machines so you won't be surprised our system has flagged up your thread. The Moderators will be keeping a close eye on this one, more particularly since you just created this new account while having started an account yesterday.

Whilst not (yet) against our Rules of Conduct, we have to wonder why someone would wish to have more than one account.

As far as I know I only have one account. There may have been some confusion on my end when I signed up. I tried signing up via Gmail, and it wasn't working so I made an account manually. In hindsight it wasn't working because my VPN was on, since it wasn't working manually either until I turned the VPN off.

I only signed up yesterday because I've usually been able to find solutions to problems I have by searching the forums. Let me know if I'm breaking any rules, and I will either remove the post or adjust it so it is in accordance with the rules. I have nothing but respect for this forum and don't want to degrade it in any way. I thought I was clear that this was not a hackintosh related question but if anyone thinks otherwise I'll gladly take this down or change it.

 

[Saga Lout]

As it is clearly hardware related, we won't be too precious over the hackintosh thing but if it came down to receiving advice about finding software fixes, those psots would be removed.

Please PM me as to which account you want to keep - this one or that with your full name as username.