Question Problem Boot!!!!!

[QweeilyNorth]

Hello, I own HP Pavilion dv6-6070se



I have a problem that the screen is black but everything is working, but when I press any button on the keyboard, a very short beep appears and the laptop continues to work normally

 

[tcsenter]

I'm just gonna guess CMOS (RTC) battery on a laptop that old. CR 2032 and doesn't even have wiring attached. Hardware service guide .pdf file

 

[mikeymikec]

Connect it to an external screen, use whatever keyboard combination that laptop has to switch screens and see how it reacts?