Repair For MacBook Pro A1989 That Won't Turn On

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Repair For MacBook Pro A1989 That Won't Turn On: crwdns2935265:00crwdnd2935265:01crwdnd2935265:03crwdne2935265:0

Repair For MacBook Pro A1989 That Won't Turn On: crwdns2935265:00crwdnd2935265:02crwdnd2935265:03crwdne2935265:0

Repair For MacBook Pro A1989 That Won't Turn On: crwdns2935265:00crwdnd2935265:03crwdnd2935265:03crwdne2935265:0

Unplug BY-T200. Solder the chip back to the motherboard.
Plug in the power cable. The BY-3200 shows an increase in input voltage from 5V to 20V.
The current jump on the DC power supply is normal, which indicates that the motherboard is turned on.

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