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Improperly powered down my computer after freeze, now computer turns on but black screen and fans wind up and down constantly.

Tags:
  • Windows 7
  • Computers
  • Systems
  • Shutdown
Last response: in Systems
May 20, 2013 6:10:14 AM

Essentially, I powered down my computer last night. It froze up on the blue Windows 7 Shut Down screen. After 25 mins or so I gave it a hard shut down via the front power button. Upon trying to turn it back on, everything powers up but nothing on the monitor. The fans turn on, wind up, then wind back down, over and over again. I have unplugged cord from PSU, tried multiple hard drives, exact same result. Looking to the wonderful Tom's Hardware community for some help! Any information or techniques are appreciated. Thanks everyone.

At work so I dont have the exact specs but machine is around 3 years old.

AMD Athlon II CPU
Asus M4Axxx Mobo (cant recall full name)
8gb Corsair DDR ram
550w Thermaltake PSU
various HDD's
ATI Radeon 5700 series

More about : improperly powered computer freeze computer turns black screen fans wind constantly

May 20, 2013 6:47:57 AM

Some more information: have checked all cables, which are properly attached. System worked for 3 years up until this hard shut down last night. Tried two seperate hard drives individually. When powering on, everything seems to be receiving power/turning on/spinning in some form or fashion, but fans start to reduce speed around 1.8 to 2.4 seconds after power up, then start to speed back up after about 1.8 to 2.4 seconds from the time they reduced speed, and just continue through the cycle repeatedly. I have built four systems before but never encountered any real issues like this before. I am somewhat tech savvy so please give any and all ideas, I will give updates as soon as I can try them out.
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May 20, 2013 7:49:14 AM

One last bit of information that worries me the most.
Before shutting down my computer a few application were lagging my computer out essentially. Upon opening task manager my CPU usage had reached 100% for a few minutes. This prompted me to shut it down for the night after closing out all applications. This worries me due to the age of the system.
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May 21, 2013 8:35:02 AM

I have a client's computer with the same problem. Toshiba L650. Starts, no screen, fan and HDD noises, after 5-0 seconds it shutsdown, then restarts, over and over.

The laptop running Windows 7, updated using Microsoft Update (DURING Shutdown), and when restarted the next day, it showed the same symptoms as you describe.

I removed the battery and tried just power from charger, no change. I removed the hard drive and memory, cleared the CMOS, started it and the PC booted to the bios. I refitted the hard drive and replaced the memory with 2 new sticks, and the machine booted normally. But at shutdown, Windows 7 shuts down, but the PC never shuts off, the lights stay on, and the fans keep spinning. I shutdown by holding the button for 5 seconds, restarted, and rolled back Windows using System Restore to before the updates. PC works perfectly, shuts down normally. Reinstalled all updates manually, and the shutdown problem is back! Just about to roll it back again, and update one update at a time to find the problem.

Hope this helps your search for an answer.



RDTTKA12 said:
Essentially, I powered down my computer last night. It froze up on the blue Windows 7 Shut Down screen. After 25 mins or so I gave it a hard shut down via the front power button. Upon trying to turn it back on, everything powers up but nothing on the monitor. The fans turn on, wind up, then wind back down, over and over again. I have unplugged cord from PSU, tried multiple hard drives, exact same result. Looking to the wonderful Tom's Hardware community for some help! Any information or techniques are appreciated. Thanks everyone.

At work so I dont have the exact specs but machine is around 3 years old.

AMD Athlon II CPU
Asus M4Axxx Mobo (cant recall full name)
8gb Corsair DDR ram
550w Thermaltake PSU
various HDD's
ATI Radeon 5700 series


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