Device Information
• Model: MacBook Pro 14” M1 Pro (A2442)
• Logic board number: 820-02443-05
Original Issue
The device suffered liquid damage, causing a short circuit on the logic board.
Near the audio jack area, the CR852 capacitor pad was severely burned, creating a clear short-circuit path. The board could not power on properly.
Work Performed
Removed the short circuit by drilling through the board (bypassing the short path) in the CR852 area.
Current Status
• When powered on, the screen shows support.apple.com/mac/restore.
• Suspect SSD not being detected (system cannot boot).
• Measured SSD power rails appear normal:
• PP2V5_NAND ≈ 2.5 V
• PP1V2_NAND ≈ 1.2 V
• PP0V9_NAND ≈ 0.87 V
→ No short to ground detected.
• Keyboard not recognized (no response; cannot enter DFU mode using keyboard shortcuts).
• Can force DFU mode by shorting SV100 pin, but DFU restore process fails.
Main Goal
Data recovery – extract important files from the internal SSD.
Request for Advice
Does anyone have experience with this kind of issue?
• Could damage near CR852 affect SSD or keyboard communication?
• What key points or signals should I check next?
Any suggestions or guidance would be greatly appreciated!
• Model: MacBook Pro 14” M1 Pro (A2442)
• Logic board number: 820-02443-05
Original Issue
The device suffered liquid damage, causing a short circuit on the logic board.
Near the audio jack area, the CR852 capacitor pad was severely burned, creating a clear short-circuit path. The board could not power on properly.
Work Performed
Removed the short circuit by drilling through the board (bypassing the short path) in the CR852 area.
Current Status
• When powered on, the screen shows support.apple.com/mac/restore.
• Suspect SSD not being detected (system cannot boot).
• Measured SSD power rails appear normal:
• PP2V5_NAND ≈ 2.5 V
• PP1V2_NAND ≈ 1.2 V
• PP0V9_NAND ≈ 0.87 V
→ No short to ground detected.
• Keyboard not recognized (no response; cannot enter DFU mode using keyboard shortcuts).
• Can force DFU mode by shorting SV100 pin, but DFU restore process fails.
Main Goal
Data recovery – extract important files from the internal SSD.
Request for Advice
Does anyone have experience with this kind of issue?
• Could damage near CR852 affect SSD or keyboard communication?
• What key points or signals should I check next?
Any suggestions or guidance would be greatly appreciated!
