I trued all of the ram modules in the hp and they worked fine, so i know its not the ram. I went to Gateway website an checked, it says
"■533 and 667 MHz DDR2 SDRAM
■Two 200-pin SODIMM Sockets on Motherboard
■Both End-User Accessible
■Expandable to 4 GB 533 or 667 MHz DDR2"
Does the "dual Channel" mean it only works with dual channel ram and not a single ram module?