I have an HP Pavilion Notebook (dv9724tx) running Vista which, whenever i turn it on, switches on the led lights, the fan moves for a few seconds then everything stops, with the screen remaining black. The LED lights stay on, the computer just won't boot into the BIOS. It is not a battery problem and I have tried reseating the RAM. This all occured after the computer suddenly died while booted, then after starting to boot back into windows afterwards, died while loading Vista. It has not displayed anything on the screen since. Specs: INTEL CORE 2 DUO T7700 (2.4GHZ/4MB L2 CACHE/800MHZ FSB) 3GB DDR2 RAM 500GB (2X 250GB) 5400RPM HDD 17 INCH WXGA+ (1440 X 900) BRIGHTVIEW DISPLAY BLU-RAY ROM WITH SUPERMULTI DVD+/-RW DUAL LAYER DRIVE NVIDIA GEFORCE 8600M GS WITH 512MB DEDICATED VIDEO MEMORY INTEGRATED 10/100/1000 GIGABIT LAN, INTEGRATED 802.11 A/G/N WLAN, INTEGRATED BLUETOOTH, 56K MODEM INTEGRATED AUDIO, INTEGRATED WEBCAM, 5-IN-1 DIGITAL MEDIA READER 3X USB 2.0 PORTS, 1X FIREWIRE PORT, 1X HDMI PORT Thanks in advance to any help received.