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Apple MacBook Pro A1286 no back light solution by replacing power bank ic.

A1286 15" no back light has been successfully done by replacing power bank IC. Absolutely outstanding experience! Such models like 15” and 17” usually use power bank chip to enable the back light driver ic whereas 13” a1278 and MacBook Air  don’t use power bank chipset . Usually it has been seen that no back light occurs due to LP8550 that is dedicated for back light driver and the enabling signal voltage comes through SMC controller IO chip. 15” A1286 part no 820-2915-b has a pawer bank chip in stead of SMC chip in order to enabling the back light chip LP8550.enable 

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