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My desktop was working fine until yesterday. i unplugged the power cord from the back of tower and checked to see if some ram i ha in a differnt tower would work. i then put the cover back on tower and hooked power cord back up in back of pc.now when i turn it on it is running but nothing is going to mymonitor. its just black and says no signal. its not the monitor i checked to be sure.

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It seems that this is a RAM problem, try this power off the computer then take all the RAM that you have in there. Then just put the known working RAM on that computer 1 stick of RAM will do and then also double check if everything is connected fine including the cable connected to the Tower from the monitor unplug and replug it back in. Then power on the computer and check if it will be fine now and if not listen for any beep sound that you will hear then post it back here for the update.

Posted on May 26, 2010

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For that first try your ram in different slots of motherboard.
Pull cmos cell from motherboard for 10 minutes then refix it.
Make sure motherboard is not ground with cabinet.
Reconnect processor and it's fan.
Reconnect pci or vga card if any.
Reconnect both connection to harddrive.
Clean dust from all parts.
Try reconnecting ram 4 to 5times then it will work again.
Let me know if you need further assistance.
Thanks for using FixYa.

Posted on May 26, 2010

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  • missydb39 May 26, 2010

    WHERE IS THE CMOS CELL AT OR WHAT DOES IT LOOK LIKE?

  • Cmos cell i round cell on motherboard .
    For that you need to open cpu cabinet .
    It looks like below image.
    http://ramanathan.files.wordpress.com/20..." target="_blank" rel="nofollow" >click here
    Let me know if you need further assistance.
    Thanks for using FixYa.


  • check num lock led on key board when you turn on the computer if your num lock led is on and off when you press num lock key then cpu is working fine.
    Then when you press power button of computer press F8 key untill you see safe mode and other menu then enter in "Enable vga mode " and change screen resolution to 1024*768 in display settings.
    But if num lock led is constant then you need to check above in cpu cabinet.
    Let me know if you need further assistance.
    Thanks for using FixYa.


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The Acer Aspire L100 is a desktop computer powered by a special DC adapter and power cable. The computer's motherboard incorporates a fuse designed to prevent any power surges from damaging the computer. If the fuse burns out due to a power surge or for any other reason, the computer will no longer function. You can check the motherboard fuse for damage yourself, then take it to a trained technician for replacement if needed

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  • 2 Press the "On/Off" button on the front of the tower. If the computer will not boot and the fan does not turn on, the fuse may be burned out.
  • 3 Unplug the power cord from the rear of the tower.
  • 4 Turn the tower on its side and remove the Phillips-head screws connecting the back panel to the Aspire L100's cabinet.
  • 5 Pull out the motherboard assembly gently from the back of the cabinet. The internal fuse is located on the motherboard behind the DC power jack, which is to the right of the monitor jack.

  • Read more: Fuse Location on Acer Aspire L100 ' eHow.co.uk http://www.ehow.co.uk/how_7815704_fuse-location-acer-aspire-l100.html#ixzz1XUVwmxuA

  • 3 Unplug the power cord from the rear of the tower.
  • 4 Turn the tower on its side and remove the Phillips-head screws connecting the back panel to the Aspire L100's cabinet.
  • 5 Pull out the motherboard assembly gently from the back of the cabinet. The internal fuse is located on the motherboard behind the DC power jack, which is to the right of the monitor jack.

  • Read more: Fuse Location on Acer Aspire L100 ' eHow.co.uk http://www.ehow.co.uk/how_7815704_fuse-location-acer-aspire-l100.html#ixzz1XUVwmxuA

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