HP550 laptop Intermittent backlight / inverter problem??
We have about 70 plus of these ordered in since last summer. We've only now had reports that the screen dims intermittently (no fixed duration of time) giving the effect that the backlight has turned off. The only way to get it back again is to make it go into standby and bring it out again. It is rumored to happen on various different laptops of the same model. We use the laptops on battery and that is when the problem occurs, so plugging them in can't really be a solution.
I've checked the bios and there are no related options to change there.
I've tried changing the graphics driver version, but my colleague has mentioned that it happened to him whilst testing and it stayed dim whilst he rebooted the laptop several times, so I'm guessing that rules out the driver.
I've turned off all power saving features.
The brightness settings don't seem to have any effect.
When it happened last the battery still had an 1 hour and a half left in it.
I haven't tried attaching an external monitor yet, but will next time to see what happens.
Has anyone else come across this yet? I'm not sure how often this is occurring to know how big a problem it might be, but if it is a faulty component, it could be a bit of a headache sending off all the laptops for repair.