Led lights blinking DV7 and DV4

Alrighty   i got two machines  one running vista  one runing windows  7    the one running vista is a DV7 and the DV 4 runs 7    
both computers do not boot at all   the fan turns on the backlight on the display turns on and the memory units are all fine.  the lights on the keyboard ( scroll and caps ) are blinking continuously, 3 sec between each blink   ive tryed everything. need help fast  these computers are inportant need them running again!!!   please help!

Hello karwath29r.  I understand that you're unable to get either of your notebooks to boot.
The flashing CAPS LOCK keys indicate an error.  It will be very helpful to be able to determine which blink code you are getting.  Take a look at this document and determine which blink pattern you're getting.
Let me know the result.  Have an excellent weekend!
Please click the white star under my name to give me Kudos as a way to say "Thanks!"
Click the "Accept as Solution" button if I resolve your issue.

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