PC turned on, black screen. Fixes itself after a day of rest

Hi, Recently I've had this problem of my system starting but not showing any display. Sometimes, it boots up to ' Loading windows' screen and then restart before the windows logo is completely displayed and then the screen goes black with CPU fans, LED turned on.
After leaving it untouched for about 12-16 hours, it sometimes boot normally only to force restart when playing games or after 2-3 hour.
FX 6300
Asus m5A97
Radeon HD 7770 2GB
Corsair Vengeance 4GB DDR3 1600Mhz
Corsair VS 550w
Seagate 2TB 7200RPM HDD

My inner feeling says it's PSU however a mechanic said it's the GPU by running a low power GT 210. However, a GPU shouldn't be affected by rest times right? System is 3 years old
Any help is appreciated, thanks.
7 answers Last reply Best Answer
More about turned black screen fixes day rest
  1. It could be the PSU, the GPU or the motherboard. Testing with a GT 210 doesn't prove much because it draws too little power. Can you borrow another PSU? If that doesn't solve the issue, then try another GPU. No component should be affected by rest time, but one obviously is; you need to figure out which one.
  2. Hi, I will have to visit the shop as I don't have any spare PSU and can't take the responsibility go borrow it from a friend. I'll update with you soon, also how come this system work some time and sometimes doesnt- does this occurunce rule out anything. How probable is the mobo being dead. Also what watt PSU would you suggest for this, I also plan to upgrade to 8GB RAM and 1050ti.
  3. In your original post you referred to a test with a GT 240; was it performed within a couple hours after you had the issue? If the system worked, did you reinstall your GPU and if so, did it work?

    Fortunately you can reproduce the issue quite easily; if the system requires 12-16 hours to work properly again, the shop should have no difficulties identifying which component is at fault. The easiest to replace is the GPU, then the PSU and finally the motherboard.

    A 1050 Ti doesn't require a powerful PSU; a quality 400W unit is plenty.
  4. Hey,
    No, the test was not done immediately, I had issues when playing games and later aggravated to random restarts even on the desktop menu. After maybe 2 weeks of somehow running the computer for my important stuff and some game time. Then I drove to the mechanic shop and he did the test with GT 210. It went fine for about 4 hrs, no restart. But all he did was reinstall windows, drivers, office, etc. No games were tested. Just a note: GT 210 did not have a separate PCI-e connection on the on I saw. So can't really tell if it's PSU or GPU. Do note that my PC works sometimes after 12-24 hrs left untouched. But now only now it being unable to boot and gets stuck at classpnp.sys file and reboots itself. If I run startup manager of BIOS, the system remains healthy, no reboots, etc. It also doesn't start at powering up once, forcing shut down by holding power button and then trying again for 4-5 timesdoes the trick
  5. Best answer
    While your latest post may indicate a possible motherboard issue, I still don't trust your GPU. The test with the GT 240 was not that useful if it was done that late; you should have demonstrated the issue and then the test with the GT 240 should have been performed immediately. If the system had worked with the GT 240 and not when you reinstalled your GPU, then it may have proven the GPU is the issue. Your HD 7770 doesn't draw enough power to make a significant difference with the GT 240 (20W more and that's why it needs the 6-pin PCIe cable).
  6. Thanks for the reply. I would like to correct you on the GPU model being 210 and not 240. Also, is it possible for a dead GPU to randomly turn on and start working as well as deliver the same amount of fps? Thanks
  7. Yes. It also is possible for a PSU or a motherboard.
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