Backlight problems with Fujitsu laptop

I have a fujitsu laptop where the bulb is not coming on and therefore can't see an image on the screen unless a light is shining on it.  I hooked up a known working bulb to see if it was the bulb or inverter that's causing the problem but even with the working bulb it would still not come on.  My first thoughts are that the inverter has gone and needs replacing.  I have just bought a new inverter and still getting the same results.

What could be the cause of this as the new inverter definately works on another machine and the bulb is good too.
Who is Participating?

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

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.

contrast? brightness? have you checked those? maybe lame, but might happen.
The LCD cable that carries the power as well as the video signal may be compromised, or the connection or controller on the motherboard that sends power to the inverter may be the issue.
Have you reseated the lcd cable connection on the motherboard
kreeyonAuthor Commented:
Yes reseated the cable on motherboard and inverter but still the same.  Image comes on the screen but the bulb doesn't come on.  Was thinking it was the cable but not sure.

Contrast brightness levels are fine also
Why Diversity in Tech Matters

Kesha Williams, certified professional and software developer, explores the imbalance of diversity in the world of technology -- especially when it comes to hiring women. She showcases ways she's making a difference through the Colors of STEM program.

I have had one laptop with a similar problem and it was the motherboard that was the issue. Not being  able to power up the inverter.

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
kreeyonAuthor Commented:
Thanks that was what i was afraid of.
It could still be the cable but when coupled with the fact that there is an image on the screen and the inverter has been replaced, I'd think motherboard as well.
Have you tried using an external monitor, at least the laptop could still be used in this manner.
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.