Screen loosing luminosity. Is it the coverter?

Hi all,

A few weeks ago the following thing happened to my laptop (an Amilo M1437G).

I was working on a document and suddenly the screen flickered and went black.
Or this is what I thought in the beginning, because after paying attention I saw that the screen was "on", all was there and I could control the laptop.

To give you a better idea, imagine what you would see if you had the screen at lowest luminosity and at the same time you are wearing extremely dark sunglasses (like the ones used by climbers when they climb mountains fully covered by snow).
This is what has I see. And if I point a flashlight on it I can see better.

I tried searching around and from what I read I came to the conclusion that the problem should be the inverter. What do you think? Is it the inverter, a driver problem or something else?

(Meanwhile I am using the laptop through remote desktop )

 

Yep, sounds like your backlight is dead.

You can usually find individual backlights for sale on eBay and the like, but it can be a bit finicky to open up the display assembly and replace it. Fujitsu will most likely give you directions (in the form of a service manual) as to how to replace the entire display assembly, but you're probably on your own after that.

 

Tnx, I will try to call Fujitsu and ask for thje service manual.
I will let you know how it goes.

 

It is likely to be the Inverter.

Even if it was the backlight which is not the case here, I won't recommond to buy one and replace it. An LCD panel is composed of several layers (plastic like with different textures and thichnesses) and two or more PCBs. Those PCBs are very fragile. I had a screen in a full working state but it had few water marks inside the panel. I opened it to replace the layers inside it that were stained. Result I damaged the screen. When I turned it ON after the replacement of those layers, it worked but diplayed an horizontal white line about 3-4 pixels thick.

This to say, get an inverter an replace it. It's easy to replace since it's located outside the LCD panel.

 

replacing backlights is said to require a "clean room"

i too think you should replace the INVERTER and see if that helps...

 

That's true. But if we are careful we can do it in a normal room. The problem with doing it is that the PCB(s) in the back of the LCD are so fragile that they can be damaged if we press them or een just touch them during assembly or disassembly.