Thinkpad x1 video issue

[Charles Mumpower]

I have this Thinkpad x1 laptop that is exhibiting an issue I haven't came across before. When running off the battery no issues but about 5 seconds after you plug in the power adapter, the screen starts to flicker then video cuts out. The back light is still lit and the computer continues to one. I know it is working because when you hit a key you can hear the windows alert. before the laptop was giving to me it was dropped pretty hard but like I said I can charge it fully and use it. I have never came across a power adapter cause=ing an issue like this. I have wondered if its the main board or maybe a reflow may be in order. Any help would be much appreciated

 

[jarotech]

What happens if you disconnect the battery and run with just the adapter ?

 

[Charles Mumpower]

Well I havent tried that because the battary is built into the laptop, like how ipads battaries are.

 

[jarotech]

If the adapter provides the correct voltage and current to the laptop, then the problem is the components that regulate the voltage of the laptop.

 

[Charles Mumpower]

Don't suppose you would know what that looks like or how to test it do you?

 

[jarotech]

Sorry it's late, 3:05 AM here. I'll try in the evening to find a diagram for your laptop, I just found the service manual. I'll let you know later what I found.

 

[Charles Mumpower]

Dude your awesome thanx.

 

[jarotech]

I tried to find the schematic for your laptop but no luck, without the schematic I can't diagnose the problem, sorry.

 

[Charles Mumpower]

After taking it apart a and reseating every thing I am going to try a reflow. IT started to do the same thing with the video without the charger this time. IF that doesn't work I guess Im getting a new board. Thanks for your help.