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820-01700 no power
Hi Everyone, I have this board 820-01700; no history, no liquid. it’s not recognize in DFU/ Apple Configurator. Reading on meter is 5V, ~0.455amp; reading taking with board outside enclosure. PPBus is fluctuating ~ 8v. Slp and awake power is cycling from U7800. I can not find any...- JoeD94538
- Thread
- Replies: 1
- Forum: Macbook Logic Board Repair Questions
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820-01310-A iMac 27" A1419 2019 No Backlight
Hi All, I need help. This board has no backlight. One backlight output capacitor blew out and shorted. I've replaced it and still no backlight. I test with another known good display from an iMac 27" 2015 5k, but no backlight then test the original display in another iMac 2015 and the...- JoeD94538
- Thread
- Replies: 7
- Forum: Macbook Logic Board Repair Questions
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820-00928 not wake from sleep
#3 Hi All, The problem is that it will not wake for sleep. The board is clean, no history of liquid damage. Already replaced U9800, SMC, PCH and still same problem. It will work if I turn off Automatic switching / energy/ system pref. So it will wake if run on the discrete GPU, but will not...- JoeD94538
- Thread
- Replies: 13
- Forum: Macbook Logic Board Repair Questions