Requesting help identifying chip in Macbook Pro A2485

[Loki_Fido]

Hi ya folks,

I have this MacBook Pro A2485 (M1 Pro 2021) which came in for repair.

It had a shorted SSD power supply chip. Therefore it was stuck at 5V.
I replaced it and the SSD are fine. No more shorts.

But The mac still pulls 5V and 200mA. If i leave it alone for 5 mins, the mac manages to receive 20V and 40mA. Of course, which doesnt mean the mac starts after power meter reading 20V.

But while the mac is stuck at 5V, i checked the board with thermal and found this chip was trying to start. Chip picture is attached.
Chip marking is 84U504ZtD124

I googled it and searched the entire web. Nothing about it. I need some help folks. Please have a look at the pic and let me know.
Any help is appreciated.

Love you all.


Front of the board



Back of the board



Chip location on the back of the board



THE CHIP

[khaahk]

Schematics and boardview are available:
https://www.badcaps.net/forum/troubl...-and-sch-files
it is an usb-c redriver, PTN38444

[khaahk]

Schematics and boardview are available:
https://www.badcaps.net/forum/troubl...-and-sch-files
it is an usb-c redriver, PTN38444

[Loki_Fido]

Schematics and boardview are available:
https://www.badcaps.net/forum/troubl...-and-sch-files
it is an usb-c redriver, PTN38444

Thanks a million bud. Just in time too.

Love you

[Loki_Fido]

Schematics and boardview are available:
https://www.badcaps.net/forum/troubl...-and-sch-files
it is an usb-c redriver, PTN38444

Bud, im trying to buy this chip to replace, but search under PTN38444 on internet shows up nothing.
I cannot find any chip at all.
Is there a different name i could use?

[khaahk]

Donor board might be the only way.

[Loki_Fido]

Donor board might be the only way.

Ok ok ok
Thanks a lot bud.