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820-4924 No Green Light

N

_Nicco_

New member
This is my first board that I'm trying to repair. I have listed the different measurements below but I don't know where to check now. The charger light is green for a few seconds then turns orange (I don't know if this matters). I do not have a fan spin when I plug in the board to the charger. Also, do these boards automatically power on when connected to a charger or do I need to short two pins to get it to start?

When I plug in a USB mouse and plug the board into the magsafe, I the USB mouse does not light up. [TABLE="border: 1, cellpadding: 0, cellspacing: 0"]
[TR]
[TD]PPBUS_G3H[/TD]
[TD]12.54 V[/TD]
[/TR]
[TR]
[TD]OneWire[/TD]
[TD] [/TD]
[/TR]
[TR]
[TD]U7001 Pin 1 and 2[/TD]
[TD]3.39V[/TD]
[/TR]
[TR]
[TD]U7001 Pin 4[/TD]
[TD]3.43V[/TD]
[/TR]
[TR]
[TD]U7001 Pin 5[/TD]
[TD]3.43V[/TD]
[/TR]
[TR]
[TD]U7001 Pin 3[/TD]
[TD]0V[/TD]
[/TR]
[TR]
[TD] [/TD]
[TD] [/TD]
[/TR]
[TR]
[TD]U7000 Pin 1[/TD]
[TD]3.4[/TD]
[/TR]
[TR]
[TD]U7000 Pin 2[/TD]
[TD]0[/TD]
[/TR]
[TR]
[TD]U7000 Pin 3[/TD]
[TD]0[/TD]
[/TR]
[TR]
[TD]U7000 Pin 4[/TD]
[TD]3.4V[/TD]
[/TR]
[TR]
[TD]U7000 Pin 5[/TD]
[TD]3.4V[/TD]
[/TR]
[/TABLE]
This is a water damaged board with water damage near the lcd connector, keyboard connector, r1830, u8330, u1900, and q5158.

I have not put the board through the ultrasonic yet just in case I missed an area with corrosion.

Lastly, I am missing U8310 and I'm waiting on a shipment from mouser to replace it.
 
Last edited:
D

dukefawks

Administrator
Voltage on L7560 and L7520. L7520 may be pulsing check carefully best is with a scope, multimeter is too slow to catch the spike.
 
N

_Nicco_

New member
L7560 3.338V
L7520 ranges between 5.141 and 5.145V on my meter.

I do not have access to a scope at the moment.
 
N

_Nicco_

New member
From what I understand, an orange light means the onewire circuit is not working correctly. If a battery is not connected, I should be getting a green light.
 
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