LCD faulty line does not go all the way across.

[gkmaia]

My Macintosh Portable has developed a line on it's LCD.

The line goes all the way but the last 5 left pixels. There is no sign of where failure starts.

I also can't say it is bad contact from driver as the line does not go all the way.

Anyone with more experience on LCD could help me understand what type of fault is that?

[Haenk]

I'd put my money on defective memory...

[TheMG]

I have no specific experience with the Macintosh Portable,  but generally speaking such a problem could be due to one of many different types of faults:

-internal fault in the LCD panel itself

-fault in a driver IC (on back of LCD panel PCB)

-fault in the computer's video memory

The easiest way of ruling out the later, if you can get another LCD module to swap in. That will tell you if the fault is in the LCD display module or the computer (video memory).

Since the line does not go all the way across the LCD panel a bad connection to the LCD panel glass edge can be ruled out.

[gkmaia]

Looking at the microscope and mapping the pixels it gives me words from 15601 to 15679 are faulty.

I will replace the memory and see what happens.

[gkmaia]

Memory has been replaced. Line is still there.

I got to think about something else....