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820-02917 A2991 5V .15A

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Sam A

New member
To be specific, inline voltmeter shows 5V and pulses between .13A and .18A.

Using schematic/boardview for 820-02935.

Only need data.

Was run over by a skid steer. Most visible damage is to display assembly. Top case is not bent. Logic board is not bent.
No visible damage to logic board. Shields with stickers on top were bent a bit inward but were not shorting on any components.

DOES enter DFU mode

PPBUS_AON 12.2V
PP3V8_AON 3.8V
PP3V3_AON 3.3V
PPDCIN_AON 5V
PP1V8_AON 1.8V
PP5V_S2_MAIN pulses/bounces (looks like between 4.7V and 5.2V)
PP1V2_AWAKE pulses/bounces
PP1V8_S2 pulses/bounces
PP1V8_S2SW_SNS pulses/bounces
PP3V3_S2 pulses/bounces
PP5V_S2_HOLD pulses/bounces (looks like between 4.7V and 5.2V)

Watching through IR thermal camera, U5200 pulses.
 
S

Sam A

New member
Yes. This is with logic board out, disconnected from everything else.

Before logic board was pulled, USB-C voltmeter only cycled.
 
2informaticos

2informaticos

Administrator
Staff member
Can you complete revive in DFU?
If yes, data can be also recovered in DFU mode.
Be aware, restore erases SSD!
 
S

Sam A

New member
After further research I should have had a charged battery and trackpad connected. I did not. Will try again tomorrow and post result.
 
S

Sam A

New member
Well I think the battery is dead. I ordered one.
Anything else I can look at/try while I'm waiting on a battery?
 
S

Sam A

New member
Same symptoms with charged battery and trackpad connected: does not complete DFU Revive with error "Gave up waiting for device to transition from DFU state to DFU state 0xFCA (4042).

I noticed that when the board enters DFU mode, the voltages in my first post that bounce around settle down and become stable. They start to bounce again when Revive enters stage 4, "loading software".
 
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