Hi,
It is possible for a T420 or X220 motherboard to start without LCD connected?
I am thinking about building a All-In-One PC based on a Thinkpad motherboard, with monitor connected to VGA connector and TV connected to DisplayPort.
Thx,

Thank you AIX for the info, but in my case was a faulty display.
I've replaced the display and everything is fine now.
Thx again!

Thank you for the answer.
Just to confirm: some poor connection inside the LCD itself, and not between the electronic board and the LCD?
Am I right?

Hi,

I'm having some green/red horizontal lines at the bottom of display.
What would be the cause?

VGA output is fine on external monitor.

Short movie with the problem:
https://youtu.be/XvpiVI1KFFA

Thx!