I have a Gateway GT5628 Intel Core 2 Quad. It's been running fine for years. Recently it stopped booting. When I turn it on, I immediately get a single underscore (non-blinking) character on the screen, where it freezes.
- No BIOS screen of any sort displays.
- There are no beep codes
- Cannot boot to USB or DVD
- All fans seem to be running at appropriate speeds
I have done the obvious like re-seated all components, disconnected all peripherals and hard drives. I still can't get past the single underscore character. I have repaired countless PCs, and have never not seen any BIOS info before. Any ideas what to try next?