Question Broken display

[vistagamer6969]

Hello!
So today I found my old laptop (fujitsu amilo li 2727 ms2228) and I tried powering it on. My screen is black with 3 white lines on it.
Now I tried using my 1080p monitor to see if it boots but when I plug in the VGA cable and power on the monitor it says "Cannot display this video mode. Change the input to 1920x1080@60" or something very similar and obviously I can't do that...
Is there any way I can use my laptop without changing the display?

 

[vistagamer6969]

Also can the GPU support both the integrated display and the externa monitor at the same time?
Tomorrow I will try to remove the internal display to see if that helps...