Question about Dell Dimension 2400 PC Desktop

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My Dell Dimension 2400 desktop will not turn on. I have checked power connections into the back of the computer and I do have a good power supply from the wall socket. I have not checked the power cord to see if it has gone bad. One odd thing is that the last few days I have been beseiged by pop ups. Then today at first the green light would come on at the power switch but nothing would happen. (The moniter is turned on but just a blank/black screen). I turned computer on and off a couple times and now nothing comes on (1) no power switch light (2) no lights at all on the 4 light trouble shooting slot on the back of the computer. The computer is approx 3 years old. Any suggestions besides purchasing a new computer? Thanks Mike

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Your problem is one of two things:

  1. Power supply inside the computer has died
  2. The motherboard has bad capacitors.
I would get your local neighborhood geek to have a look, or drop the PC off at the local computer store for diagnosis and repair estimate. If it's only the power supply, those run about $25. If it's the motherboard, those run up to $150, and for a PC that old---I'd replace the entire unit rather that put that kind of repair money into something that actually has reached the end of its useful life.

Posted on May 19, 2008


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Jan 11, 2012 | Dell Dimension 2400 PC Desktop

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What you can do is to try to open the casing and remove all the connections specifically the cables/connections from the power supply. Reconnect the cables and try it again. if still not, reconnect the memory modules and disconnect the connection/cable of the hard drive and give it a try. If that works, just do the same process and reconnect the cable back.

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Ensure to unplug the computer first from the power before doing this. Once you have unplugged the computer from the power, press and hold the power button for 3-5 seconds. this will discharge all the remaining power that is stored on the capacitor.

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For further assistance, contact us at or call us @ 859 309 7078


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