hi my pc will not boot up it just bleeps 3 times 10 sec an bleeps again etc.... i was told that the 3 bleebs was a ram prob so i replaced it with new ones but still bleeps my op sys is windows xp

Beep codes depend on the BIOS type but that sounds like an AMI Bios

3 Beeps: Base 64K RAM failure

Explanation: There is a failure of some sort within the first 64 KB of system memory.

Diagnosis: The first bank of memory probably has a bad memory chip in it somewhere. It is possible that there is a failure related to the motherboard or a system device as well.

Recommendation:

* Treat as an apparent memory failure.
* Troubleshoot the motherboard.

http://www.pcguide.com/ts/x/sys/beep/amiB3-c.html