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Thinkcentre M55 8806 power on off problem

Thinkcentre M55 8806 A72
After the mains power is given to CPU, the PC fan runs fast then slows down and then the fan stays running in a slow speed. The power LED at front panel glows on, but the Start button in front panel of CPU has no response on pressing it. After pressing the button continuously long for atleast 10 sec., the system is forced to poweroff and the Glowing LED gets off. Now again pressing the start button the same thing is repeated, but the system does not boots. After trying this 3 or 4 times, fortunately system boots and runs good. But after shutdown, the LED is still glowing, fan is still running slowly and the above problem is repeated. (If I choose restart option from windows, then there is no trouble and system restarts properly). Please solve.... THANX

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  • anwarvety Dec 27, 2008

    Yes sir all the wirings are properly connected. Ram is properly attached. Actually on clicking shutdown button, the windows gets turned off (hard disk gets off) but the power LED is still glowing and the fan is still running (the power to motherboard does'nt gets off). Then I have to keep pressing the start button continuously to force the motherboard shutdown. Now I can't understand, why motherboard is not getting power off automatically. [Is there BIOS disturbance?]

  • mpenre1 Jan 16, 2009

    My machine fan runs on HIGH continuously, but the machine does not boot up. When I hold teh pwoer button for 10 to 15 seconds, the machine powers down, but when I press teh power button, the machine fan comes on in high speed but the machine does not reboot. This is a thinkCenter M51

  • j060403 May 18, 2009

    i have the same problem. it does boot up some time after trying many many times, but end up can't boot.



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May be your computer motherboard wires connection get loose or getting moisture in wires. Or there may be some earthing problem in ur power switch. First, check the wires connection & tighten up properly. if problem persists, check the earthing by power tester. Check you RAM if it is properly tight in the jack.

Posted on Dec 26, 2008

  • Jitender Singh Dec 27, 2008

    There may be problem with your power supply i.e inaccuracy in ATX system if it is ATX. pls consult your system administrator to fix the prob.

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