I have a WD40EZRZ-22Z5HB0 that is BSY and spins down.
I thought the head was bad so I ordered a donor HDD and replaced the head.
However, the BSY and spin down condition did not change.
So I am trying to do ROM BlockSA and LDR upload, but it doesn't work.
When I put the original head into the donor HDD and turn on the power, it becomes ready.
Is this not a problem with the head but with the SA?
Is there any solution?
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