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The client mention that this problem started to happen after the board over heated. Do you think reflowing the cpu/gpu could solve this issue?

In your opinion why the board does not give anything to screen? but port charges uses amps.

Once we get access to DFU mode what would be our next step? Why are we trying to get into DFU mode?

We can't get it to enter anything including safe mode, It does not show any display output apart from a quick flash on the external display.

Hello, We have a Apple MacBook Pro model A2141 that does not boot and has no display, the fans spin for a few seconds before stopping. We connected an external display and it lit up for a second before turning off, this loop continues indefinitely. There is no water damage and the boards...

Hello, we have an A2442 Apple MacBook pro with water damage. The MacBook uses 5v/0a on magsafe and 5v/.17a on usb c, we want to know how we can fix damage to UF800 chip and how serious the damage is. I have attached some photos of the damage for you to take a look at. .

Hello, We have Apple MacBook Pro that had corrosion on certain part of it. We washed it and clean using DI water and it is clean now. The laptop uses 20v, charges well 3amps usage. Caps Lock has activity, USB flash drive conenctivity is there. We dont have a graphic output. Even used external...

____________Customer_Board____________ PP3V8_AON -> .0001 ____________Working_Board____________ PP3V8_AON -> .3516

Can this happen automatically or intentionally by user?

Thank you very much. Why MacBook showing question mark? does it mean SSDs are dead but mac still works? or does it mean OS is corrupted? I want to understand why this happens.

We need to recover the data off of the Macbook, not reinstall the OS. Any other options?

Hello, We have an Apple MacBook A2141 that Flashes a file with a question mark symbol on the screen when powered on, it has no chime and uses 20.3v and 2.35a. Could a a problem on the logic board be causing this or could have the SSD chips failed? I have attached a couple Photos for you to...

3V8_aon -> .0v -------------------------------- PPVDD_ECPU_AWAKE -> .0V PP0V81_S1_SRAM -> .0V PP1V8_S2SW -> .0V --------------------------------- PPVDD_AMPH0_S2SW ->.0V PP1V2_AWAKE -> .0V PP0V575_S1_VDDQ0 -> .0v

Hello guys, We have a A2485 MacBook Pro that is using only 5v and .11a, when connected nothing happens at all. The customer said it is not water damage and some type of other failure. Here are some voltage readings of the main power lines. PPBUS_AON -> 12.3v PVBAT_AON_CHGR_R -> 12.30...

PPVIN_P3V3SD -> fluctuates between 10.82v - 12.24v PPVOUT_LUXE_XW -> 0.008v P3V3SD_PHASE -> 0.0v P3V3_AWAKE_SW_S -> 0.0v P3V3SD_VOS -> 0.0v PPBUS_AON_LUXE -> fluctuates between 10.82v - 12.24v PPBUS_AON -> fluctuates between 10.82v - 12.24v LUXE_COMP ->.510 PP5V_S2_LUXE_VDD -> stays at 0v, jumps...

Here is one component that was corroded in the schematic, which values should we be comparing the readings we get, and how do we know which are primary or secondary rails?

So the voltage on 12v lines are slightly fluctuating for example shows voltage 11.5-12.1 and changes frequently.

https://we.tl/t-5aGOxJktQY here is a wetransfer link for the schematics.

I attached file to this threat. See if you can download it. Thanks.

I am sharing schematic for this board with you. Please have a look. How we should know the correct values for components affected by resistors? Where it is written? Is it available in schematics? Please also guide how to easily find all secondary level power rails in schematics. thank you.