Here is the maintenance manual:

http://www-307.ibm.com/pc/support/si...cid=MIGR-46464



A vague possibility is that your CMOS battery might be flat, which could be why it won't let you into the BIOS setup.

If it is a RAM problem it may not give you beeps provided that the right quantity is being reported.

Try removing the bottom strip and see if that makes a difference