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A2159 820-01598-A no image

H

hgoncalves

Active member
Hi,

I have an A2159 820-01598-A, that has no image, internal nither external.

It seams to boot (reaches 0.560A), and after a while it reboots. I can't see any USB activity.

All big coils have voltages, except L7702 that has 0.005V

Can you help?
 
Last edited:
2informaticos

2informaticos

Administrator
Staff member
You can't expect video, if no USB activity detected.
Compare CPU core voltage behavior with good board.

Any history available?
Did you try DFU?
 
H

hgoncalves

Active member
Hi,

I don't have any other board to compare it...

Client said it stoped working over night.

I din't tried DFU. I will now.

Is there any other way to analyze it without with another good board?
 
H

hgoncalves

Active member
HI.

It isn't recognized in DFU mode. But

It responds to the power button, fan spins around 2 seconds, and then stops. CPU gets hot

Can you help?
 
H

hgoncalves

Active member
Hi.

I've tried DFU with an original 90W charger and a good battery connected.

I think it charges the battery. PPBUS_3GH gets low after charging (w/o charger conected), and the mac consumes 1.74A (with battery conected) on the ampmetter, before it reboots.
 
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