I had some Gateways that kept giving me a similar issue and sometimes pulling the memory completely out and re-seating it fixed it. If not, I had to reset the NVRAM. If I remember correctly I did something along these lines:
Opened case and located a BLUE jumper in the lower corner across from the middle PCI slot. Moved it from position 1 and 2 to positions 2 and 3.
Restarted the machine.
Went to Bios: Boot Config: Advanced and chose to reset configuration data.
Clicked Yes, F10 to exit and save.
Moved jumper back.
I have to support 11 Gateway Pentium D computers in my video lab, running XP Pro with 2 GB of RAM. Suddenly, 2 of the machines will not boot. Really won't boot, as in the DVD drive light briefly flashes at startup, but the hard drive never spins up. I don't even get the boot menu/bios screen. I've tried the basics, nothing seems to work. I'm not a newbie, but this mystifies me. I wondered if was the CMOS battery; I pulled the battery and reset it, which allowed the computer to restart in safe mode, but at reboot it went back to a blank screen. Hardware isn't my specialty, but the fact I can't even access the bios says I need some advice. Help?
--Drew BlanchardTechnology TeacherWinooski City SchoolsNormand St.Winooski, VT 05404(802) 655 - 3530 x6073