Yes, indeed, the nand flash chip needs to be replaced for a new one.

There are some other things you can try if you have the cypress I2c/Jtag interface as making a jtag connection to the nand flash chip with the bbs software and etc to erase the nand chip several times, but it ends often by replacing it.
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Doing nothing leads to nothing.

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Will be given here, or on the jb8a8f8 forum and I prefer it in English.
Johnny B.

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