(Symptom)
My LCD Screen has a faint Image.
You will have to look very closely as it can be difficult to see. But if you do see a very faint image then it is likely to be the backlight that for some reason is not working.
The backlight is a long thin phosphorous light tube that projects light through the LCD panel. I bit like the kind of Light tube you may have in a office but a lot smaller.
One of the reasons could be the lid switch. This could be stuck in the closed position or faulty. The switch works in the way to save battery power when you close the lid.
it could also off course be a faulty backlight witch would need replacing. But check the switch first by disabling it. Some have connectors that you can simply disconnect. Others you will have to use a multimeter to test if the circuit is shorted. To get to the switch you will have to disassemble the laptop. Check on my DVD Tutorial Link as this will be of great help in the disassembly. I don’t recommend you open your LCD Screen though as some can be very tricky.
Tap on the switch and around the area, should the screen light up and stay lit then you can blame the switch. Backlight is fine. Leave the lid open and laptop on for some time should you find the backlight all of a sudden switch back off then it suggests a problem with the Inverter Board. It is worth checking the cables to and from this board. This would mean some disassembly on the screen. The inverter board is located in the lower center of the LCD Screen and connects to the Backlight.
Check the Connections on both ends of the board. If you
still have the problem then the Inverter Board will need replacing.
My Image on my screen is Garbled
Use an external monitor to diagnose this problem.
If the screen image is good on your external monitor then you probably have problems with the LCD Screen, It is worth checking the LCD cable on the motherboard, below the top control panel. And on the back of the LCD.
If you still get garbled image on the external monitor then it will be the Graphics or a System Board failure (Motherboard). This would likely need to be replaced.
Horizontal or Vertical Lines running through your Screen
Usually this happens due to fatigue of the screen as you may notice that your screen twists slightly. Basically what happens is the ribbon cables that feed the LCD are sandwiched inside the edges of the LCD Panel. Once this happens you cant really repair it. Screen replacement would be needed at some point. You should still be able to connect and use an external monitor.
LCD Screen is all White or Black
Again check LCD Cables, most likely it could be the Cables inside the LCD that needs to be checked. Failing that, it could be your Graphics or System Board
