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820-001598 SSD Upgrade
- Thread starter mushr00m
- Start date
The machine doesn't automatically appear in Recovery, nor in DFU now?
Check without forcing SE032 pads.
Check without forcing SE032 pads.
SSD is still suspect, if you can't complete DFU.
People on Internet mentioned they succeed after several tries/days.
Did you try flashing U4770?
People on Internet mentioned they succeed after several tries/days.
Did you try flashing U4770?
You can try that too.
Be aware, the board was heated several times.
You should understand that there be something else damaged.
Be aware, the board was heated several times.
You should understand that there be something else damaged.
You can't be sure about the new NANDs also.
But machine should work with its original NANDs.
If not, what explication can you find, else than more damage on the board?
But machine should work with its original NANDs.
If not, what explication can you find, else than more damage on the board?
Just put the original NAND and machine is working perfectly
I think I am not going to solder again all of these 4 chips. I think they have problem and/or I soldered bad it twice and it did not worked out
Would you make a last try or since its back to life and I heated a lot the board with all of those NANDS.. give it back to customer saying not possible to upgrade at this time
I think I am not going to solder again all of these 4 chips. I think they have problem and/or I soldered bad it twice and it did not worked out
Would you make a last try or since its back to life and I heated a lot the board with all of those NANDS.. give it back to customer saying not possible to upgrade at this time
Possibly got bad NANDs, or you didn't solder them in the correct place.
If you have stock of scrap boards, then buy P13 programmer and prepare yourself the NANDs extracted from these boards.
If you have stock of scrap boards, then buy P13 programmer and prepare yourself the NANDs extracted from these boards.
To be honest with you I removed and resolder twice really think its hard to solder it bad twice.
The supplier from aliexpress told me he tested before send but anyhow.
But the question here is would you give it back original do customer and cancel the service/profit or would you tell him that we are going to make another try with those NANDS and with so much heat the machine could stop working and if it happens I do not give him any warrany?
Let me know how would you proceed
The supplier from aliexpress told me he tested before send but anyhow.
But the question here is would you give it back original do customer and cancel the service/profit or would you tell him that we are going to make another try with those NANDS and with so much heat the machine could stop working and if it happens I do not give him any warrany?
Let me know how would you proceed
Better to give it back to the client.
You've already heated the board many times, don't risk more...
The chinese sellers never test anything; they just resell what they bought in bulk quantities.
You've already heated the board many times, don't risk more...
The chinese sellers never test anything; they just resell what they bought in bulk quantities.