My friend called me over to see if we could fix his PC which was acting up lately. Here's a picture of the rig. It has a custom watercooling loop, and the problem recently occurred when my friend installed a universal GPU block so that he could put his GPU underwater too. The GPU in question is a GTS 240, and the motherboard is a Gigabyte GA-G31M-ES2L Rev 2.3 The issues and process of troubleshooting we undertook are as follows: - Everything plugged in. PC would start, give one short beep. BIOS would load, then screen would go black and PC would restart in an endless loop. All components seemed to be working, yet the PC would not fully boot. - Everything except GPU plugged in. Using Motherboard video out. PC starts, but goes black after arriving at BIOS. continuous beeps. This was fixed by removing one of the two sticks of RAM. The result was a system that could boot successfully, however upon reaching the login screen, the screen would become artefacted and the PC unuseable. - These happenings led me to believe the motherboard was shot. Here is a video giving a bit more detail. Here is the list of parts: CPU: intel Core 2 Duo e7500 GPU: nVidia GTS 240 HDD(s): Seagate barracuda 2tb, 500GB / WD caviar green 500GB WC system: Thermaltake Bigwater with custom blocks PSU: OCZ Fatal1ty 550W RAM: Transcend 4GB ddr2 My suspicion is that the motherboard is shot, however I'm still unsure. Any help would be greatly appreciated. Cheers, Tom.