I'm working on a Gateway MS2274 laptop for a customer. The system will randomly not power on. The batery will charge but the system won't power on either with battery only, AC only or both. After pressing the power button several times the system will power on & boot normally with no errors. The system will reboot normally and can even be shutdown and restarted within a few moments normally. I left the system shutdown and unplugged overnight; once again it will not boot. I plugged it in and let it charge the battery, still won't boot. The cooliong fan will spin up & you can hear the HDD engage for about 5 seconds, then they go off. The screen doesn't light up either.
When it does boot, there are no issues; the system has no apparent infection or other issue. For running Vista it moves pretty quick. I'm thinking it's a motherboard issue but hardware diagnostics show all systems normal, even after several passes.