Question about Compaq Presario 7478 PC Desktop
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Posted on Jan 02, 2017
SOURCE: Black screen
My next step would be to see if there is a CPU fan and find out if it is spinning. The problem sounds like a bad CPU, which is usually caused by a bad fan.
Are there any beeps when you try to start it? If the answer is yes, then it is probably a bad video card or motherboard.
If there are no beeps, spinning fans, or lights turning on, it could be a problem with power. You changed the power supply, so the next thing to check would be the cables all the way from the wall to the motherboard. You also should verify that the power switch that is actually built onto the power supply is set to on before you try the other power switch on the front of the computer.
Posted on Jan 26, 2009
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