SOURCE: IBM ThinkPad T21 LCD display very dark
The problem can be at the flexible cable that connecting mainboard to LCD panel. There are two line that connecting to backlight lamp. The position of the broken cable is in bottom-center of LCD. One or more line/track broken can resulting : LCD blank or LCD display very dark. The solution is : jumper the broken line with jumper cable & soldering.Or you must replace the flexible cable.
Goodluck..
SOURCE: Screen Brightness gone too low on toshiba satellite 1110 laptop
Hello Tim,
Sorry to answer u by this news :
this problem u have happening by 2 cases ..
1st Case :::: that's maybe ur screen lamps is broken ..so u can see the data but very dark or no Back-light .. so u will need to replace the screen..or advanced option but with expret person to change the lamps from another broken sceen,,
2nd Case ::::: The high-voltage board..it's small board built below the screen to give the screen the right voltage to light on .. so u will need to replace it also ..or Advanced option also but with expert electronic person to check it ..
best luck.
SOURCE: Laptop LCD display problem
The backlight is the light bult that illuminates the screen. Before it finally goes out completely it will turn your screen a pink color on startup (and then usually become brighter and the pink fades). It is also possible that the backlight, also called a Cold Cathode Flourescent Light, CCFL, died an immediate death. But usually they take a while and signal with the "PINKNESS" first. If you found that your computer is working just fine connected to an external monitor (and you moved the base of your laptop around while connected to the monitor to be sure and left the computer on for a long time) then you have verified that the screen is the problem. It is usually two things: (1) the inverter, a circuit board that increases the voltage to supply the LCD which eats around 700 volts (yeah baby); or (2) the backlight itself. The first problem is a relatively easy and inexpensive fix. You can find how to replace an inverter by downloading the Hardware Maintenance Manual for the T40, T41, etc., from IBM/Lenovo's site. Replacing the backlight itself, a bulb that is like a strand of speghetti and even more delicate, is a tougher job. I would suggest purchasing a replacement screen in that event rather than replacing the backlight yourself. (The HMM probably does not show you how to replace the backlight/CCFL as it is a potentially dangerous job.) That suggestion assumes you can find a cost-effective replacement screen and do not mind opening the TP and putting the new screen in. At least look at the HMM to see what is involved. Good luck.
SOURCE: Dell Inspiron 6000 Laptop Screen has Faint Image
Sounds like your inverter has loose components on the pcb. Replacing inverters is not that costly and a relatively easy repair. Read about CCFL tube failure here.
Testimonial: "excellent advice and right on, as I have solved my problem by replacing the inverter"
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