Got mine today absolutely superb quality. I love how heavy they feel.
You have done the whole community proud with these, many many thanks for the countless hour's you've put in to get these produced.
That's odd you just remove ic20 and ic29 like you already did, plug the test roms in and power up and it should loop endlessly.
I think maybe M27C1001 are JEDEC and you need non JEDEC M27C1000 for the test ROMs?