Hi all, Newbie on forum came to get some help. I got an old system of my parents for fix. Following is the config: GPU: BFG GEFORCE 7950GT factory OC MoBo: GIGABYTE GA-M55 SLI-S4 Processor: AMD Athalon 64x2 Memory: 2x DDR2 533(4) 16GB When system switched on, it make one beep, Keyboard Num Lock gets on and withing 3 - 5 seconds Num Lock get off and doesn't get On again.. No display comes out of the box.. Monitor shows black screen. I removed RAM and checked in another system - Working fine I removed Display card and checked in another system - Working fine I swapped PSU 450W and no changes.. I am almost lost now.. Please guide.. Cheers