my PC had 512 MB DDR2 PC2 4200 on 1 slot and the other slot is empty
I tried to upgrade RAM to 2GB (2X1GB) but the system is beep 4 time , I removed 1GB and the same sound (4 beeps)
I changed RAM and also slots and the same sound (4 Beeps) , I put the old 512 MB DDR2 at first slot and the other 1GB it is work fine but the actual RAM is only 1 GB . I exchange the slots and its run good with the same size (only 1 GB).
so >>>> the PC will stop 4 beeps only when the old 512MB is already at any one of slots either that will beeps
when i tried the crucial scan !!!!!!!!!!!!!!! OMG the scanner says slot number 1 contains 1GB DDR2 and the other slot is empty. but actually one slot have 1GB DDR2 and the other slot have 512MB DDR2
my BIOS is up to date . and I rested the BIOS by Battery removing ... but the same problem appears