Lcd killing Macbook logic boards ?

[Argolin]

Hard to believe, but I have no other logical explanation. I've been swapping lcds with different boards for ever with no major issue, but lately it seems like an epidemic..I've piled up 3 boards with backlight problems that didn't have any problem as such when they came in, only thing in common is that they've been used in a similar way.
Anyone has experienced anything like that ? Is it possible something in the monitor triggers some short and kills some component ?
All boards now show the no backlight behaviour, image is seen only when pointing a light. Any help ? Thanks in advance

[llonen]

Re: Lcd killing Macbook logic boards ?

Complete model number please, these have a back-light fuse located on the main logic board, is it the same LCD panel that has been used on the three logic boards.

[Argolin]

Re: Lcd killing Macbook logic boards ?

Sure, I realized I forgot necessary details, sorry..
The suspect panel comes from a 820-2533-A
All boards belong to A1286 family, 15" macbook pro:
820-2533-A C2D
820-2850-A i7dual
820-2850-A i5

[Argolin]

Re: Lcd killing Macbook logic boards ?

Just checked the first 820-2850-A and the backlight fuse is gone for good, as you suggested and will probably see the same on the others.
Any insight on what could have happened and how to avoid repeating such stupid mistake ?

[llonen]

Re: Lcd killing Macbook logic boards ?

Check the LCD connectors, then look at LP8550 backlight controller, also check for shorts to ground on the lcd side.