Intermittent problems with laptop LCD panel

Hi,

I have an EEE PC here with strange artefacts which come and go intermittently.  It has the following 4 states:

1. Normal
2. Distorted as shown in the attached image, distorted part of screen flickers
3. Fine horizontal lines which flicker
4. Completely black

It reacts to movement of the netbook's lid and can always be made distorted or normal by working the lid forward and backwards a little.

I have disassembled the machine and held the screen in my hands, and I could only with difficulty induce any distortions (flicking it back and forth as it would if it were attached to the lid).  I reseated the VGA cable both at the motherboard and back of the screen, but it made no difference. The image on an external monitor is perfect, even when the laptop's screen is distorted.

So, I'm presuming that it's either the screen or the VGA cable (maybe getting pinched as the lid is moved back and forth).  Has anyone any thoughts?

 Screen in distorted state
mark_D74Asked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
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.

vincem1099Commented:
Did you inspect the cable at the hinge point?
0
mark_D74Author Commented:
@vincem1099 Yes, this laptop needs to be pretty much disassembled to get at the screen. It looked normal.
0
vincem1099Commented:
Did the distortions occur if the when bending the cable back and forth?

0
C++ 11 Fundamentals

This course will introduce you to C++ 11 and teach you about syntax fundamentals.

mark_D74Author Commented:
@vincem1099 Not really, I tried to reproduce the problem specifically be bending the cable back and forth at that point and it didn't seem to make any different.  Nor did waggling the cable about at any point on its' length.  I even tried tapping where the cable meets the motherboard and where it meets the back of the screen.  It's pretty strange, it's a lot harder to reproduce the problem when the screen is free of the chassis it's screwed into.
0
vincem1099Commented:
Yes that is odd.  Perhaps there is a pinch in the way screen is screwed into the chassis
0

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
nobusCommented:
this picture looks like a bad screen here a site with pics to compare : http://www.lcdparts.net/howto/symptom.aspx
0
mark_D74Author Commented:
Just as an update, I'm still not certain whether it's the VGA cable or the screen that's at fault.  Although the distortions would normally indicate a faulty screen, manipulating the cable now sometimes reproduces the effects. So, I've ordered a cable.  I'll update this as to whether that fixes the problem when the cable arrives.
0
nobusCommented:
i hope for you it's the cable, but i would be  flabberghasted if it was not the screen - but strange things may happen in 2012
0
nobusCommented:
i still suppose bad screen
0
mark_D74Author Commented:
The motherboard died either before or during the fitting of the new VGA cable.  So, either it was a deteriorating motherboard problem or it is something else we will never know.
0
nobusCommented:
agreed
0
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
Displays / Monitors

From novice to tech pro — start learning today.