i saw you posted here that your nand flash seems to be corrupted to.
No, it doesn't.
I repaired approx 100pcs dsox2000/3000 with the programmer and no one replacement of nand flash was needed
congrats with the free repair covered by service note))
NAND corruption discussed here refers to corruption of data stored in NAND, not physical chip failure. Reprogramming the scope (seems this is exactly what you have done) with later firmware rectifies the problem. No chip replacement is needed.
I will probably never know what the problem was exactly.
All the symptoms pointed to a NAND flash corruption but I am pretty sure that the firmware was already at 2.65.
I tried all the listed methods in this thread to revive the unit, using V2.35 and V2.65 firmware, to no avail.
I reported this to Keysight, they accepted the unit and offered repair under service note but they did replace the entire front of the unit. So essentially I have a new 2014A. Customer Service Report states:
"Your instrument was repaired by core exchange. Firmware updated and device adjusted and checked". Serial number and rear housing remain unchanged."
Whether the NAND flash was just corrupted or damaged, I don't know. The repair report didn't mention that.