This seem to be a very helpful community and here is my problem ps and I already did google for the last 5 hr for a fix.
Laptop background: this is a Sony vaio vgn fz190,purchase in 2008
Problem: screen won't turn on just a blank screen. I can hear the harddrive and CPU/ fan running. Battery is off and running on the AC plug. Only light indicater is power and wifi. And a cylinder symbol blink for a second and turn off. There was no beeping sound.
Fixed procedure that I have tried:
Plug in a external monitor after it catch signal the monitor goes on to sleep mode
Unplug ac adapter/battery/ram and press the power button for 30sec
Put in the recovery disk to reboot
Hope this community cane help me