Laptop screen doesn't work unless I plug in then unplug an external monitor
Posted on 2014-02-04
Hi fellow techies,
I have a really odd customer laptop in at the moment.
The customer brought me her laptop to replace the screen hinges (she later told me that it had been dropped).
I replaced the hinges, all good as new. I tested it and got nothing on the screen so I plugged it in to my KVW switch and it sprang to life, I unplugged it and it was working perfectly on the built in screen so I shut it down and got her to collect it.
She got it home and the screen was blank, so she brought it back, any how, I have discovered that all I need to do to MAKE it work is to plug in my KVM VGA plug and remove it again. It never works on it's own, the problem remains identical and the fix always works.
Before I set aside an hour or so to strip it all down and check for internal damage from the fall, etc. has this ever happened to any of you and if so, what was it?
My guess would be that it is something to do with grounding. I can't remember whether the internal video cable had a ring connector to screw down on or if it is CCFL / LED unfortunately.
Thanks in advance!