My sister gave me her computer to use, but it won't boot up. The power supply seems fine because the fan starts running but it sounds like it powers up then slows down only to power up again. And it just has a blank black screen. Any suggestions? Is it the motherboard??
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Re: Won't boot up. Help!
Could be a number of things, but first check the disc shaped CR2032 cmos battery located on the motherboard, in case it is flat.
Then when the pc boots, you should get the cmos menu to enable you to alter the time and date.
If still no boot, when it is booting press F8 and see if you can get to safe mode, and when in the menu select last known good configuration and press enter or a reboot.
If you see no bios screen and the flashing cursor appears in the top left of the screen the cmos chip on the board is damaged, and the motherboard needs replacing.
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The problem could be a hardware problem. You can try removing the ram to see if it's faulty otherwise I am afraid you are unlucky because could be a motheroard problem so the only solution is to bring your laptop to repair service.
See if power supply fan is running. If not....the power supply is bad. Also...see if there are any lights lit on the Motherboard. If not....the power supply is bad. You can pick one up on ebay pretty reasonable. Hope this helps.
If the fan is failing the most times the computer will not start because it will overheat. There are two fans inside the system, one inside the Power Supply and one that sits on the motherboard.
Remove the Power Cord, Open the case, Remove the cover and with a can of compressed air blow out the dust inside the computer. Clean the dust away from the Fans, Vents, CPU and Heat Sink are that sits under the Fan on the motherboard.
Remove the Power Cord, Open the Case and remove one of thememory chips. Set the chip aside then try rebooting the computer. If it boots, then you know the memory chip you set aside is bad so mark an x onit with an ink pen. If it fails to boot then move the chip to the nextmemory slot and try rebooting. If it fails take the chip out and set itaside, then put the other chip in and try booting it in both slots. If itboots, just to verify that the chip set aside is bad, mark an x on it and putit into the open memory chip slot and try booting.
There are 2 basic fans in Dell tower one for the power supply and the other for the Processor. If your computer is not booting then the Processor fan is most likely to be the culprit. What could be happening is that the Processor fan is no longer turning fast enough to cool the processor, so normal the processor when it over heats there is either protection to switch off the computer automatically or the computer won't boot. The best thing is to change the fan and make sure it is working properly but checking on the cables that they won't entangle on top of the fan to impede it's movement. You can easily damage your processor if the fan is not working properly.
Remove the RAM and install it again and restart.....it will work if still not work then change remove RAM again and start your machine..it will give beep sound...if it will not give beep sound then understand your machine's mother board is faulty......