PC hardware--CPU & Motherboard & RAM/Post startup issues

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Question
I have a desktop using windows xp. When I switch on the power, on my desktop it beeps once and then it shutdown.
I have changed the atx power supply unit and it still give the same problem. It beeps once, on power up and then it shutdown.
Can you advise me what to check?.
Thx,
alvin

Answer
You need to see what the beep code means. The one beep and then shutdown, according to what BIOS you have, means a specific thing. Like a specific hardware problem. You can see a listing of beep codes by BIOS version here http://www.computerhope.com/beep.htm

PC hardware--CPU & Motherboard & RAM

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Keith

Expertise

Experienced in complete system builds where knowledge of kinds and types of motherboards, processors, and RAM have to be compatible. This includes intermediate knowledge of video card technologies and the troubleshooting and repair of problems associated with said hardware.

Experience

11 years experience as a self-employed PC technician with 100% customer satisfaction.

Education/Credentials
4 classes from a Networking degree. Mostly self-taught.

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