Compaq Presario CQ56 Notebook PC turns on but it won't show anything on the screen
My Neighbors laptop Hard drive Failed. Bought a new HDD and installed Win 7.
later When I turn it on the screen is blank, and it seems like it doesn't log into Windows (because when it goes into Windows it usually makes the welcome noise) the Capslock light flashes continuously ( flash then pause for 3 sec and flash again), the CD drive works, the wireless light is red, on the left side in one of the USB ports it has a small light that flickers a bit and then stops after I turn on the computer. The laptop battery works, the AC adapter works (the light where the adapter connects to turns on when I connect it), I tried take out the battery and disconnect the adapter and turn on the So everything works except the screen is blank, I connected another external Monitor but no display as well.
As suggested in some forum Strip apart and cleaned the fan as well, changed the ram and RAM slots, Still nothing works. Same Caps lock flashes continually and Wireless light is red / orange.
Thanks in advance.