My computer broke over the weekend, I turned it on and their was nothing on the monitor, so I took my computer and hooked it up to another monitor and again nothing, I pulled the AGP Geforce Card out and tried it in another system and the card works just fine, so I than took the AGP Rage card and hooked it upto my system and nothing, so than I took a PCI Video card and tried that and again nothing, as far as any error codes all I get is a siren sound unlike any beep code. I know that the Monitor and Geforce Video card works, so my Question is could their be a problem with the BIOS or even the northbridge chipset on my MSI mainboard MS-6380 LE useing Apollo KT266 chipset that consists of VT8366 Super Northbridge and VT8233 Southbridge ?, or should I replace the Mainboard ?