I have HP pavillion dv 7 laptop, It comes on but has black screen, caps light blinking, put new power cord, it sounds really s

[Brenda_65]

My HP Pavillion dv7 has black screen, I changed the power plug, because the other one made a staticy noise. I can hear everything running, but screen is black and caps light is blinking and the f12 light is red. Thanks for your help.

 

[helpstar]

try with an external monitor or TV

only the power plug or the whole AC charger?