MACBOOK PRO A2141 SSD SHORT

[Arshad alam4659]

I HAVE A MACBOOK PRO A2141 820-01700 THIS BOARD IS PP2V5_NAND_SSD1 SHORT TO GROUND THEN I CHECK ONE SIDE U8600 IS SHORT THIS SIDE IS ONLY ONE CHIP U8600 OTHER SIDE
PP2V5_NAND_SSD1 IS OK AND U9100 U9200 U9300 U9400 IS ALSO OK Will removing the U8600 fix the board or will I have to install a new one

Link to boardview --> https://www.badcaps.net/forum/troubl...91#post1449091

[reformatt]

The usual failure pattern for NAND failure on these is one of the TPS62180 IC's going short and applying PPBUS_G3H directly to the associated NAND's. So you will have a simultaneous short on PPBUS_G3H and the PP2V5 NAND rail in that instance.

If the short is confined to only one of the PP2V5 NAND rails and PPBUS_G3H is ok, there is a high chance this is due to a shorted cap on the SSD power rail. Usual candidates on this model are C9586/C9588/C9587/C9589/C9591/C9592 or C9086/C9087/C9088/C9089/C9091/C9092.

You can't simply replace these NAND's with a new chip. Each is pre-programmed by Apple, and if transplanted from a donor, need to be exact same config and swapped to the same locations. A DFU restore will fail with a blank chip installed,

[Arshad alam4659]

The usual failure pattern for NAND failure on these is one of the TPS62180 IC's going short and applying PPBUS_G3H directly to the associated NAND's. So you will have a simultaneous short on PPBUS_G3H and the PP2V5 NAND rail in that instance.

If the short is confined to only one of the PP2V5 NAND rails and PPBUS_G3H is ok, there is a high chance this is due to a shorted cap on the SSD power rail. Usual candidates on this model are C9586/C9588/C9587/C9589/C9591/C9592 or C9086/C9087/C9088/C9089/C9091/C9092.

You can't simply replace these NAND's with a new chip. Each is pre-programmed by Apple, and if transplanted from a donor, need to be exact same config and swapped to the same locations. A DFU restore will fail with a blank chip installed,

ppbus_g3h is ok no short here o

u8600 is short i remove this chip PP2V5_NAND_SSD1 is ok no short
What should I do now? I don't have the old same board. Should I return it or try installing a new chip?

[reformatt]

Apple's storage is rather expensive. So they have put in some pretty effective blocks to replacing or upgrading the storage on the MAC's. This video covers it pretty well:

https://www.youtube.com/watch?v=yR7m...annel=iBoffRCC

Note the reprogramming of old NAND's with the P13 programmer basically removes wear data like TB written etc.

That TPS62180 buck converter is a fairly common failure, and they are still using it on some of the newer Apple Silicon mac's as well.

[Arshad alam4659]

Apple's storage is rather expensive. So they have put in some pretty effective blocks to replacing or upgrading the storage on the MAC's. This video covers it pretty well:

https://www.youtube.com/watch?v=yR7m...annel=iBoffRCC

Note the reprogramming of old NAND's with the P13 programmer basically removes wear data like TB written etc.

That TPS62180 buck converter is a fairly common failure, and they are still using it on some of the newer Apple Silicon mac's as well.

Which programmer is best and where to buy it i want to purchase

[reformatt]

AFAIK, the JCID P13 or P15 programmer will work for BGA110 NAND's. You need dumps of the chip configurations etc to program.

Check out DosDude1 YT channel. He pioneers a lot of this work in replacing or upgrading SSD's on MAC's.

https://www.youtube.com/user/dosdude1/videos

He also has a thread on upgrading Apple Silicon MAC's (not T2) here:

https://forums.macrumors.com/threads...hread.2417822/

[Arshad alam4659]

Macbook pro a2141 (820-01700-05 ) 512gb nand short how can i change with 128gb or 256gb someone can explain. customer not agree with this price