crwdns2944351:0crwdnd2944351:0Repair For MacBook Pro A1989 That Won't Turn Oncrwdnd2944351:0crwdne2944351:0

crwdns2866306:0crwdne2866306:0	MacBook Pro 13"2018 (A1989)
Type	replacement
Thing	SoC ROM (U4770)
Title	MacBook Pro A1989 Won't Turn On Repair
Time Required Min	crwdns2931287:045crwdne2931287:0
Time Required Max	crwdns2931287:045crwdne2931287:0
Imageid	crwdns2933769:0crwdne2933769:0 crwdns2933771:0crwdne2933771:0
Difficulty	Moderate
Conclusion	In the first place, we used MacBook BY-3200 power cable to observe the change of boot voltage and current. The voltage values related to the boot circuit on the motherboard were found to be normal after measuring. To determine whether the fault was caused by data problems, BY-T200 Data Assistant was used to read and write the data of T2 chip ROM. After rewriting the ROM data of T2 chip, the MacBook could turn on and enter the system. The no power fault has been cleared.
Author	REWA
Public	crwdns2853046:0crwdne2853046:0

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