LCD of Laptop is dark, while pluged in

[mj2000]

Hi all.
I am using Dell Inspiron 1520 on Windows 7 SP1.


I have a sudden problem :


The LCD is real dark, but when i disconnect the ac adaptor, it is ok. Also : there is no problem while using the battery. But while plugged in, the brightness is low.





I appreciate your help !

 

[Yard Dog]

Hmmm.. mj2000 .. sounds like a bad ac adapter . Any chance.. you can swap out with a known good one ?

 

[mj2000]

I am using my original ac adapter. Anyway i used another compatible one, the problem still exists.

 

[HarriePateman]

Is the laptop old?

It sounds like something is shorting inside the case.

Blow all the visible just away.

 

[AddRAM]

What is the brightness set to while plugged in ?

 

[z3r010]

Have you tried the laptop brightness controls? a quick google says pressing the "FN" key + the up arrow should do it.

 

[gregrocker]

Check also in Control Panel>Power Options>Change Plan Settings what the Screen Brightness settings are when on A/C power: