You might want to test your memory with this free utility:
http://www.simmtester.com/
DocMemory, an advanced self-bootable PC Memory Diagnostic Software is a user friendly software designed to capture all possible memory failures in PC.
A rigorous test pattern excerises both the PC Base and Extended Memory to locate defective memory, all carried out without the need for user to disassemble memory from the PC.
Download the software and the installation program automatically create a self-booting diagnostic diskette. Simply insert this diskette into the floppy and reboot your PC to begin testing your system memory.
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by: LeeTutorPosted on 2002-11-30 at 07:58:06ID: 7514505
It would be helpful if we knew the exact model number of your Compaq Presario laptop; there are dozens of Presarios. I don't know much about Compaq computers, but I am assuming that the BIOS manufacturer is Phoenix, for this web page describes a beep sequence like what you describe, and the problem is bad memory:
.com/hardw arecentral /tutorials /13/ 3/
http://www.hardwarecentral
Phoenix beep codes are more detailed than are the AMI codes. It emits three sets of beeps. For example, 1 -pause- 3 -pause- 3. This is a 1-3-3 combination and each set of beeps is separated by a brief pause. You need to listen and count when your computer starts doing this. Reboot and recount if you have to.
2-_-_ Any combination of beeps after two means that some of your memory is bad, and unless you want to get real technical, you should probably have the guys in the lab coats test the memory for you. Take your computer to the shop.