Backlight failure once lid is closed

Hey guys,

got a Fujitsu P7010, 10", the machine works fine until i close the lid and reopen the backlight goes off. You can the see the display but very faintly. Sometimes i can close the lid halfway and the backlight goes off. I've checked the power managements and no setting for it to go into standby.

The only way to get in back is to power off and then power on again. So my question is it the inverter or the actually backlight lamp?

I;ve checked in safemode to see if it was a driver issue but still the same issue occurs so defo not a driver problem.

Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Perhaps it is a loose connection that is triggered when you move the lid?

You said you can recreate the issue when it is half closed. If you leave the lid at that point and restart does the problem correct itself or does it continue to be a non-working backlight?
It sounds like a loose wire. If you able, open it up and check how well the monitor cables are connected.

Here is a disassembly guide:

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Peter HartCommented:
on my laptop I can configure it to ignore the lid being closed - this may stop the problme for now.
but it sounds like a it recieves a signal to switch off the screen  but not to switch it on - it is was a hard fualt (ie. invertor) it would always be faulty - it may be a dirty connection instead of a loose wire.
I wouldn't do this but .... you could try some switch cleaner spray if you could find the switch.
Cloud Class® Course: SQL Server Core 2016

This course will introduce you to SQL Server Core 2016, as well as teach you about SSMS, data tools, installation, server configuration, using Management Studio, and writing and executing queries.

igal14Author Commented:
could it be a sensor issue? and does anyone know where its located? plmrest or motherboard?
Sorry Mike. i did a bit of digging around and was not able to find a service manual that would mention the location of such a device. I also wasn't able to find any forums that spoke of it either.

Have you been able to make any progress with suggestions that had been given?
I don't want to be arrogant but that kind of problem solving is pure nonsense and time wasting.
Could it be this? Could it be that? What if it is something else?  
Open it and CHECK!

The sensor you are talking about is called a "hinge switch", and if at least you would have opened the disassembly guide I attached in my first post and actually read it, you would have found that at the step number 24 it is said " 
 24.  Remove 1 screw from the hinge
switch, remove the tape from the
status LED cable and lift them out.

Anyway, I consider further discussion to be pointless as Author does not provide any feed back and only makes wild guesses and speculates regarding the possible causes of  the problem without making any attempt to fix the issue.
I withdraw myself.

Eikroman that is a perfect guide. I am sorry I did not look at it earlier it would have saved me time searching for the service manuals. ;) I believe that should answer any questions as to how to get things apart and where parts are located. Now it is just a matter of finding the faulty part. I think that the hing switch or a loose cable is a good place to start.
Peter HartCommented:
" don't want to be arrogant "... yeah right..just a bit...
@Eikroman - bad day at the office?  your rant has probably frightened the author off.
why not answer his questions instead of redirecting him?
"where is the sensor ?" - since you have read the manual.... you could add some value by answering the question instead ofproviding a link where to look.
igal14Author Commented:
thanks guys for responding back especially Eikroman not sure who took the jam out of his donut, but i will give it a try i've just been bogged down with work.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Laptops Notebooks

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.