computer does not power on...

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fro

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Mar 19, 2004
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195
i dont know what happen but my computer does not power on...

can someone help me. on this... i bought a new power supply.. and put it on.. but still does not power on...
 

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Joined
Mar 3, 2000
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4,168
Are you getting any beeps when you try to boot?

Are the fans turning?

Are any lights on the front coming on or flashing when you try?
 
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Unplug everything except the video, cpu fan and try to see if anything happens.
 

crjdriver

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Jan 2, 2001
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Is this a new build or was it working and just stopped powering on? Since you replaced the ps, which can just about rule out the ps as the source of the problem.

I would try for a post outside of the case. To do this remove the mb from the case and put it on the box it came in [do not use the anti-static bag; some bags the outer surface conducts electricity] Connect just the video card and one ram chip [unless you have RDRAM and need two] connect the ps both the twenty pin connector and the four pin connector [if used] Now find the connection on the mb where the power switch connects to and jump across the contacts with a small screwdriver. If it posts now, you know that you have either a mounting problem or a bad switch on the case.

As a quick test for a bad switch, I connect the reset switch to the connectors for the power switch. Push the reset switch and if it powers on, you know you have a bad switch.

If it does not power up outside of the case, you will need to start swapping parts with known good units ie mb, processor.

One last thought; make sure you have the hsf plugged into the correct fan header. Some boards will shutdown if they do not detect a fan signal. If this is a new build, make sure the clear cmos jumper is not in the clear position.
 
Joined
Mar 31, 2004
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186
I don' t want rule out a defective ps that was purchased. There might be a switch on the power supply itself that turns it on and off. Or a bad power cable. Question why was the ps replaced in the first place and was it designed to work with your model of motherboard.
 
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things to check on the power supply. Make sure that it is set to 110 volt and is on.
 

crjdriver

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43,453
Since it is not a new build, have you tried the test with the power switch / reset switch?
 
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