Last year I replaced the LCD on my son's 13" Macbook Pro after it cracked when closed on something. All was OK until a few weeks ago it developed a vertical line @ 1" wide in centre screen which could be eliminated by adjusting the angle of the lid. Over the past week several additional lines appeared and adjusting the lid no longer made any difference. The external monitor works OK. Thinking it was either a bad LVDS cable or connection to the LCD, y'day I opened it up and found that the LVDS connection at both ends looked good with the retaining clips in position. However, when pressing on the connector at the LCD end with the machine booted, it was possible to clear all but one of the vertical lines so I decided to disconnect and reconnect the LVDS cable. However on rebooting after doing this the LCD only came up as a solid white screen. The display is still recognized in the preferences and the screen can be dimmed via the keyboard - just no video. An external monitor works OK. I'm thinking something has either shorted in the connector or cable, damaging the LCD, or the LVDS cable has gone bad. Before I order parts on spec, I'm concerned that a short may mean the fault may be on the main board and replacing the cable and LCD would be a waste of $$ - but I don't know how I can test this. My question then is if there is any advice / suggestion on how I can verify if the fault is on the mac or in the cable / LCD before I spend what may be bad money trying to fix the problem. Advice / suggestion appreciated.