However, the backlight was not working after doing the repair. Because I got the unit cheap enough it was worth it for me to pickup a complete display assembly. So I looked for a used LVDS cable but was unable to find one (they are sold as part of the complete display assembly). Looks like a botched repair job by someone. When I took it apart the LVDS connector end was ripped apart. Was a mid 2009 and not under warranty anymore.
If your WLED driver is blown you may measure zero or low resistance on some of the pins that are not supposed to be ground. Unplug battery or battery connector.ĭevice LP8543 Pin 1 is lower left and counts counter clockwise around the device.
Make sure power is removed from board before testing resistance. A useful method is to test the resistance (impedance) from each pin of the WLED driver device to ground. In particular the WLED driver should be checked for failure. Update: There are many many more tips and info in this thread to help you with troubleshooting backlight issues on Macbook Unibody. I am trying to find someone who has one of these logic boards accessable that can identify what this part is supposed to be. I am not sure if this component might be a fuse that has been removed. Upon close examination of the components surrounding the LVDS connector I notice I have a component missing compared to a detailed photo of the same motherboard that I found on the net.
I ordered a replacement display assembly (complete with LVDS cable). I took it apart ad discovered that the LVDS cable end was completely destroyed. I obtained a Macbook Pro 13 unibody with non functioning display (everything else works). READ CAREFULLY the whole thread before messing around with component substitutions. IT IS NOT A FUSE!!! PLEASE do not go about replacing this part with anything other than a capacitor. IMPORTANT NOTE: Further in this thread you will read that this part is a high frequency capacitor.
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