Sorry to hear but as I say earlier, it only helps if it's not a hardware issue.

Maybe it's still not working because one, or more nand flash chip pins does not soldered well, the ones which are used, or maybe it's because you have used your old nand flash chip.
However, when the programming went well, then there should be no reason to think that it's caused due this.
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Doing nothing leads to nothing.

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Johnny B.

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