blank and black sreen

[wan haa nic raff]

How to check wht the problem with xps 15 black sreen.when I on the power, it have blank and not anything out of window.but the laptop and hardwre still working.i had troubleshoot with fn+power and it hear out 3 beep mny time.wht the issue was fail my laptop.

 

[COLGeek]

Does the system work properly when connected to an external display?

 

[jarotech]

Hi, three beeps is a problem with the RAM, almost every time. Look at these informations.