How to diagnose a cracked LCD
 

I noticed alot for people wonder how they could fix they broken/cracked/blank screen/dim light/ rainbow lines..

Here is a quick writeup on how to diagnose cracked screens.

This could be a possible sticky....

Diagnosis / Recommendations
Do I need a new display? Perhaps. Is it:

Cracked? A cracked display cannot be repaired and requires the purchase of a new display.

Dim / Black? A dim display is either the result of 1) a faulty inverter which is a separate piece from the display or 2) a burned out backlight which is part of the display. In the majority of instances, the inverter is the cause of the problem and not the backlight as most people tend to assume and therefore does not require the purchase of a display.

Lines? A display with lines may be caused by either 1) the video card or 2) the display. In the majority of instances, the display is the cause for lines and therefore requires the purchase of a display.

My 3 year old 17" PC laptop screen is quite dim now....any ideas how much it would cost to get new CCFL's put in? It's not a big deal, as I just got a new Macbook Pro, but my gf is hinting that she wants my old PC, so I'd like to get it looking good/better.

or your inverter could be getting less efficient with age...