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Nitinrajkumar replied to Macbook A2141 / 820-01700-A / Nand burned

in Troubleshooting Laptops, Tablets, and Mobile Devices

07-30-2022, 07:38 AM
Re: Macbook A2141 / 820-01700-A / Nand burned

Is there is any data to understand the storage of the nand through alfa-numeric letters printed on it?

I used JC BGA110 to check this nand, it's showing 64GB ....

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Nitinrajkumar replied to Macbook A2141 / 820-01700-A / Nand burned

in Troubleshooting Laptops, Tablets, and Mobile Devices

07-30-2022, 06:21 AM
Re: Macbook A2141 / 820-01700-A / Nand burned

there are 5 nands in this logicboard, i only removed 4 & now short is gone .

a single nand is only placed on one side of the logicboard.

i still need T2 procedure or i can only install the new nands & restore it.

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Nitinrajkumar replied to Macbook A2141 / 820-01700-A / Nand burned

in Troubleshooting Laptops, Tablets, and Mobile Devices

07-30-2022, 01:35 AM
Re: Macbook A2141 / 820-01700-A / Nand burned

We can replace this short nand?

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Nitinrajkumar replied to Macbook A2141 / 820-01700-A / Nand burned

in Troubleshooting Laptops, Tablets, and Mobile Devices

07-28-2022, 09:41 AM
Re: Macbook A2141 / 820-01700-A / Nand burned

i measure the gnd resistance value on all three caps after lifting it. still this rail is short to ground.

before your last reply i already lifted 2 nand from the logicboard, i found more heating in thermal camera after ejecting the 2V5 volt from DC supply.

from reference of boardview i measure pad value of nand, i found 1V8 & 2V5 both volt line is short to ground in nand itself. both nand are showing short

i am confuse is this ok?

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Nitinrajkumar replied to Macbook A2141 / 820-01700-A / Nand burned

in Troubleshooting Laptops, Tablets, and Mobile Devices

07-28-2022, 05:52 AM
Re: Macbook A2141 / 820-01700-A / Nand burned

meter setting...

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Nitinrajkumar replied to Macbook A2141 / 820-01700-A / Nand burned

in Troubleshooting Laptops, Tablets, and Mobile Devices

07-28-2022, 05:13 AM
Re: Macbook A2141 / 820-01700-A / Nand burned

i lifted both the inductors L5930 & L9580, inductor L9530 consumer side resistance value to ground is 01.1ohms & inductor L9580 consumer side resistance value to ground is 02.2ohms.

inductor L9581 both side is short to ground , regulator side 0.8ohms & consumer side 02.2ohms .

what can we do next?

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Last edited by Nitinrajkumar; 07-28-2022, 05:43 AM. Reason: wrong posted
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Nitinrajkumar replied to Macbook A2141 / 820-01700-A / Nand burned

in Troubleshooting Laptops, Tablets, and Mobile Devices

07-27-2022, 09:41 AM
Re: Macbook A2141 / 820-01700-A / Nand burned

Hi

i have also same machine Macbook A2141 / 820-01700-A

i found this both volt line short to ground

PP2V5_NAND_SSD0
PP1V8_NAND_SSD0

any idea what to do next?

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Nitinrajkumar replied to New Members - please post your introductions here

in Announcements & Related News

07-27-2022, 09:31 AM
Re: New Members - please post your introductions here

Hello
i am Nitin Sachdev from India, i hope you all are doing well.
By Profession i am a technician do repairing work have own business of apple device repair, have little bit knowledge of components want to learn more from you guys.

Thanks
Best Wishes

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