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· Registered
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Discussion Starter · #1 ·
Hello fellow hardware nuts, I have a problem that I cannot seem to fix myself, thus I come to you for assistance! :thumb:

For the longest time my computer has been acting up. The acting up consists of the computer not booting properly after reboots, but only sometimes, electricity leaking from the usb ports, BSODs with varying error codes and sometimes not posting. The way this happens is the screen is not turned on and just the fans slowly ramping up in speed. Then I hold down the power button and the pc shuts off, rinse and repeat sometimes 10 times, other times 5.

I have concluded that the component to blame must be my motherboard and or the CPU.

I base that assumption on the fact that I have changed power supply, graphics card, hard drive, cooler, and ram to try to find out what the problem was. The only components remaining are the motherboard and CPU.

Btw. Here are my specs:
• CPU: I5 3570k
• Mobo: Asrock z77e-itx
• Gpu: EVGA 970
• PSU: EVGA Supernova 750W
• RAM: Kingston HyperX 16GB

Not so long ago, out of nowhere the computer, after I shut down the computer for the night, the next morning it wouldn’t boot. And I mean nothing at all, the fans wasn’t spinning no lights, only the psu rely was indication of something happening. So I assumed that the reaper had finally come for it and changed it out with a spare motherboard and CPU that I had lying around for the occasion (Asrock h81 itx, and Pentium g3258). And what do you know, everything is running flawlessly.

Now comes the kicker. Today I decided to check up on the old motherboard and, of course, it worked. So I am now wondering if it could be the bios chip on the old motherboard that is faulty or something that I will be able to fix...

I hope someone will be able to help me, I want my 4 cores back. Please.:sad:

· TSF Moderator , Hardware Team , Networking Team
12,053 Posts
Welcome to TSF! :smile:

What I would try is to reassemble and run a bare-bones system outside of the case.

  1. Remove EVERYTHING from the case.
  2. Place the motherboard on a non-conductive surface, such as cardboard (motherboard box) or plywood. Do *-NOT-* place the motherboard on the anti-static bag! It can actually conduct electricity.
  3. Install the CPU, thermal grease and heat sink. (Intel Guide / AMD Guide)
  4. Install 1 RAM module (stick). If your motherboard requires two, install two.
  5. If applicable, install the video card and attach the power supply connection(s) to the card if your card needs it.
  6. Connect the monitor to the video output.
  7. Connect the power supply to the motherboard with both the 24-pin main ATX power connector and the separate 4- or 8-pin power connector.
  8. Connect a power lead from the power supply to the power connector on the CPU fan.
  9. Connect power to the power supply.
  10. Do NOT connect ANYTHING else.
  11. Use a small screwdriver to momentarily short the power switch connector on the motherboard. Consult your motherboard manual to find which two pins connect to your case's power switch. When you momentarily touch both pins with a screwdriver, it will complete the circuit and boot the system.

With any luck the system should power up and you should get a display. If so, assemble these same parts into the case and try booting once again. If the system now fails to boot, you have a short in the case and need to recheck your motherboard standoffs.

If the system did not boot up, more often than not, you have a faulty component. Start swapping parts until you determine which one is defective. Best bet would be to start with the power supply.

· Team Manager - Hardware, Acting Manager, Security
14,939 Posts
By any chance have you run memtest86 for 4 full tests at least (which could take 4-5 hours) on the memory because it sounds like memory issue to me.
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