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Hello, I was carrying out a screen repair for my little brothers MacBook and everything was running smoothly even had the backlight working and had it all on to make sure it was fine before reassembling. When I turned it on I noticed an awful lot of heat coming from the right hand side of the Macbook and the backlight just switched off but the keyboard lights are still on, I then turned the Macbook off by holding down the power button. I have turned it on and tried to shine a light through the back because I understand that if it is the backlight itself I should still see some of the screen but I am not even seeing any of the LCD working now. I unscrewed the back panel and had a look at the small fuse but it’s so tiny and I cant tell if it is blown as I don’t have the required tools continuity meter. Does anyone have any ideas as to what is could be? I did buy a cheaper version of the screen from ebay, so I’m now thinking it may be the actual screen itself as my understanding is that the 2 ribbon cables I actually connect into it turns the backlight on? Also can I just had I can smell a burning smell from the long pin on the screen and macbook side, like it has overheat. Thanks for the help in advance, Jamie
Please could you add some pictures? For example, what do you mean by “long pin on the screen”? Have you replaced just the LCD panel or the whole lid assembly? Which 2 ribbon cables are you talking about, the backlight and LCD cable when replacing just the LCD? If so, it’s possible you plugged the backlight cable in the wrong way. If you cannot see any picture, this would not be a backlight issue. Try the original screen to see if it is showing picture, or lighting up, to determine whether it is a board issue. You may have chipped the LCD cable on the new screen, which can short the LCD connector on the board. A cheaper version of the screen wouldn’t cause an issue, all 11" LCD panels are original AUO, LG or Samsung, they don’t produce copies (you likely got sold one where it does not have the original screen protectors, has been peeled off before, cleaned and reapplied). If you do not have the multimeter to measure points on the board, or the tools to replace soldered components, I would recommend trying the original screen, and if it is a board issue, sending it somewhere. When carrying out logic board repairs, there is always a chance of making the issue worse if you don’t know what you are doing. I do not have a schematic or board view to hand for this model, but if you get hold of these and a multimeter, the first thing I would check is LCD_IG_PWR_EN, to see if it recognises the screen being plugged in.
