Replaced keyboard and now the caps lock light and num lock light are blinking and no screen???

I just replaced my keyboard on my HP DV6-2155DX Laptop and got it all back together and now there is no display on the screen and the caps lock light that indicated that caps lock is on and the num lock indicator light are both flashing. any help and all??? thanks you

Ouch, doesn't sound good, but...
Have you done a PRAM reset, CMD+Option+p+r...
http://support.apple.com/kb/HT1379
In fact, do 3 in a row, takes a bit of time.
Intel-based Macs: Resetting the System Management Controller (SMC)...
http://support.apple.com/kb/HT3964

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