I am having this problem with my Pavilion dv7: CAPS & NUM Lock flash twice. My laptop has no battery, no hdd, is powered solely by being plugged in. I have unplugged it, forced shut down (by holding the power button) waited 30 seconds, 60 seconds, 2 minutes, etc. and the screen remains black. I have also removed the BIOS battery (1 day). Since the screen is black, I am not able to run any of the Fx suggestions, or any other type of startup. I tried several times Windows+B combination with two usb sticks, the last one... an old USB stick with 128MB formatted as FAT16 and with HP_TOOLS installed. The BIOS file to flash is 3635F12, extracted from sp46804. I tried also with the oldest sp45171 and his 3635F03.FD bios file renamed as 3635.BIN, 3635.WPH, F03.BIN After read those 31 pages of posts, I did a lot things with PhoenixTool219, but I did not get any sig file. I tried with 3639.BIN after read about numbers under battery too. HDD still has originals partitions (4): Windows, Recovery, HP_TOOLS and System. Can you HELP ME? Product: VT360EA#ABE Model: dv7-3020es Under battery: REV: 3639-200 Thanks!