This 820-00850 board came in with missing SSD power rail PP2V7_NAND_SSD0. I found a 2Ω short to ground on PPBUS_G3H_SSD0, which I fixed by replacing the voltage regulator U9080. Now I am left with a short on PP2V7_NAND_SSD0 (4Ω to ground). Injection of 2V into PP2V7_NAND_SSD0 warms up all four NAND chips. Is there any hope that the SSD is not toast?
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820-00850 with NAND/SSD issues (A1989 2018)
- Thread starter sekidata
- Start date
If the chips heat, no doubt...
Yes, but mark them before removing.
You must solder each chip in the same position.
You must solder each chip in the same position.