I have just attempted to upgrade the RAM by adding 1GB to a free slot. Though the specs were consistent with the existing memory (256Mb modules), I have subsequently found that the MOBO only supports up to 512 units in each slot. I got the beep message signifying a RAM problem when I first put it in, but now having removed it and tried different positions for the original RAM, continue to get this error message and no boot. I have tried removing, resetting, clearing data by resetting the BIOS, all to no avail. I can't boot up with the original spec. Is both my new and old RAM dead or is there someother reset I can try?