I am experiencing that my computer is rebooting at random times and not even reaching BIOS. It happens mostly after my computer have been turned off over the night. but sometime just random.

Here's a list of what i have tried to do.

  • Tried different RAM
  • Used one RAM chip at the time, and switched between them.
  • Switched power suply
  • Removed CMOS, waited 30min and put it back.
  • Changed computer case, so the mobo has been taken out.
  • Removed power, pressed on button 30 secs, put power back in, try to boot

changing ram chips helped me for a little while, but the problem came back few days later. if i unplug the power a couple of times it boots up as normal like nothing ever happened.

Hardware: - MOBO: MSI Z77-GD55 - CPU: Intel i5 2500k - XFX 7870 ghz edition - RAM:Corsair Value S DDR3 1333mhz 8gb - SSD: Intel SSD 330 series 128gb - HDD: 2x Seagate Baracuda 1tb HDD - Watercooling: Corsair H80i

Anyone that can help me?


I woke up this morning and nothing worked again, heard this three beeps wich states an memory error, but everything worked perfect after reseating the RAM yesterday.

  • Why do you suspect the memory instead of the HDD or drivers? We need more information on the. Have you ran sfc /scannow to verify there are no system integrity problems? – Ramhound May 15 '14 at 11:05
  • Do you get any periods where you can use the computer? – Dave May 15 '14 at 11:09
  • Yes, i cut power a couple of times, and then i can use it as normal again. i even play games as normal, like nothing ever happened – Espen May 15 '14 at 11:19
  • @Ramhound i dont know for sure, it might be. I havent tried it – Espen May 15 '14 at 11:21
  • 1
    @Psycogeek post has been edited with specs – Espen May 15 '14 at 11:30

I will provide the trouble shooting steps I would take to solve this. I've worked the past year or so as level two desktop support technician at a university.

  1. Ensure all bios settings are correct after CMOS reset (remove auto overclocks, etc)
  2. Run a sfc scan to make sure system files are okay.
  3. Try running WhatCrashed to see if it can determine any drivers or faulty hardware that could be causing issues. WhatCrashed analyzes your crash dumps/BSOD logs.
  4. Look at Windows event viewer to see if there are any software in particular that are regularly hanging, and then monitor those with software to see what they are interfacing with before they crash
  5. Run the relevant hardware tests, memtest (test memory outside windows, if possible), and any other hardware tests -- such as CPU, gfx card, etc. Monitor temperatures.
  6. Test the power source to make sure it's not dropping power.

Ideally, back up your data, and remove all of the software variables here that could be contributing this issue, and then see if it's still happening:

  1. Format the hard drive and reinstall windows. Install only the base requirements (drivers)

  2. Monitor the system to see if the issue returns.

  3. If it reoccurs, it is either 1) hardware related or driver related. Refer to the steps provided above to try and determine which it is.

At any case, you must perform the appropriate hardware tests, regardless of what you do: Stress test the RAM sticks, the CPU and the GFX card (if applicable) and monitor temperatures using stability monitoring software, such as prime95, furmark and memtest. Also, but sure to check the HDD health.

My gut instinct is the motherboard by the way, since you've replaced the PSU already.

I've had a similar issue with my home PC before. It's also interesting to note that you don't successfully post, which to me signals the motherboard or CPU straight away. I would be interested in finding out the cause of these crashes in the first place, because they'll most likely point to the component that's preventing the PC from posting correctly.

  • im gonna try this after work and come back with updates. – Espen May 15 '14 at 11:29
  • Next time the issue occurs, unplug the PC from the power source, hold the power buttons for 20-30 seconds (you might note the power light turns on, or stays on when you do this, this is normal). After doing this, plug the PC back into the power source and try to boot her up. – anditpainsme May 15 '14 at 11:33
  • the computer was without power for 5 hours, tried to reboot, same issue. tried to hold in for about 30secs without power, still the same issue... – Espen May 15 '14 at 11:47
  • So the PC gets power, but never reaches post and just stays on with no display? – anditpainsme May 15 '14 at 11:51
  • there is power, i can see the screen wake up, all fans are running, but no BIOS.. – Espen May 15 '14 at 11:52

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