crwdns2934241:0crwdne2934241:0 Boonsong Mekaroon

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Surface pro4 can not turn on with battery but it can turn on with charging cable plug in, 99% came from schottky diode was  damaged from sparking during install main borad back on place (see photo ) just replace this diode your Pro4 will be OK

[image|2029182]

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open