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820-00138-a liquid damaged no power up

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speedyaction

New member
Hi. I have here 820-00138-a board after water damaged on keyboard. i removed board and check under microscope but i can't see any water damaged on it (checked 3 times). Laptop no powering up when i connect charger. Somebody told me that board need to be connected to good battery is that true? Don't have board view to check voltage on board. Anybody had this problem b4?
 
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dukefawks

Administrator
Needs a REAL 85W charger also to power up. I believe it powers up without battery but will have shut down issues.
 
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speedyaction

New member
am using bench power supply and is no working. also i opened brand new original charger 85w but no powering up at all. its strange because is not any liquid on main board. difficult for me to fix it if i dont have board view for it
 
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speedyaction

New member
when i connect original charger 85w green light coming up then orange after so is charging. i have 12v and 3.4v on battery connector pins so charging is ok
 
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dukefawks

Administrator
Got 3V on L7560? Orange light does not mean it is charging, it will turn orange without a battery too. What is PPBUS without battery connected?
 
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dukefawks

Administrator
Use 3787 board view and brain power, there is no easy way with these board. It could still be a bad battery, not 100% sure these need a working battery. I have no machine to verify this on right now.
 
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speedyaction

New member
am sorry for be we bit not professional here. am learning only 1 year. am fixing plenty macbooks but sometimes i have some problems. am using board view from 3787 but when i search for SMC_ADAPTER_EN testing points on main board is not this same what is on 00138 so is difficult to tall. also battery is dead because when i plugged in its showing me charging . i have 12v and 3.4v on battery connector . i charger it for wee while then disconnect charger and check for voltage it was very low so battery is gone to
 
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dukefawks

Administrator
Well S4 not being present is the worst thing to diagnose and does not get us anywhere. I need to know if SMC_ADAPTER_EN is high and you need to test the board with a charged battery.
 
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