I have a used Dell E6400 I bought 1 year ago. When I pack it up to take it to the library….I get there, power to the log in screen and the display is really, really dim. I can just barely see it. On many occasions I closed the lid and immediately reopened it sure enough it’s back to full bright.
Failure of the lid sensor? I set the ALS to off in BIOS and changed the windows power settings to “do nothing” when the lid is shut. Also in the advanced settings (Power Options) I made sure the “Enable adaptive brightness” is off and the dimmed display brightness is 100%. It still did it.
As long as I closed and re-opened the lid it came back on. But for the past two days the screen would not come back on doing this. I happen to close, open the lid then pull the power cord to go on AC power and it came right on!
I saw on a post it might be the inverter. But wouldn’t that just fail outright? What would opening and closing the lid have to do with that?
Any other ideas what’s wrong? I may just replace the inverter if I can find one reasonably priced.
Thanks.