I am trying to add memory to a Gateway SOLO 5300. According to the I-Net it can hold 512MB of PC-100 or PC-133 (with Windows Errors). It currently has 1 PC-100 CL3 SYNC memory module (PC100U-322-620). I have tried three different PC-100 SODIMM 256MB modules one at a time in either slot and it will not boot. I put the original 128 in and back to windows xp...just really slow. I am doing this for a friend that has a very limited budget. So...what am I missing with this? Are there different types of SODIMM PC-100 modules with identical pins? One of the three modules has decent markings...(256mb, SDR SODIMM, H 32VHS 0201P24298) Guessing it is a Kingston (has KS on it).
Anyway...I have been fixing pc's for about 20 years but was never an expert at memory. Anyone have any ideas as to what I should be looking for?