Mystery dull screen

[johnners]

Hi all,

My first post. I hope this is in the right section.



I have a new (2nd hand) HP Elitebook 8440p. It has a very dim display. When I cycle through the 0%, 25%, 50 % etc. brightness setting, it makes little difference. It is brighter on 100% and dimmer on 0%, but the intermediate options do nothing.



I already have another 8440p and I can tell that the full brightness on this new one is closer to 50% on the old one.



I have tried the following:



Updated all the drivers

Uninstalled and reinstalled the drivers

Tried tweaking display settings as recommended online (although some of those settings don't appear on this laptop)

I have removed the screen from the good laptop and installed it on the new machine

I have switched all the display cables /connectors from the good latop to the new machine.

The older machine still works fine, with the hardware from the new machine, but I still have the same problem with a dull display on the new machine.



Also the dim screen seems to have a slightly blue / purple tinge to it.



Is there some other hardware or software option that I have missed? It's really baffling me!



Any advice would be appreciated as I am out of ideas and as I have bad eyesight, I'm unable to use this machine at the minute.



TIA



Johnners

 

[Porthos]

Thanks for your interest in the forums. But this is a place for computer business owners and professionals.

From the forum rules when you signed up...

No End Users
These forums are for either current computer technicians, or soon to be computer technicians. We do not provide computer help to any non-technicians. @Kraken

I suggest you take it to a local computer repair shop.