We recently fielded a number of the Sharp BP-545WR MFP's. When to service one that was having problems. It would not boot up. It had an error code on the screen of A0-19. Eventually I was able to get it to boot up. When I went into Sim mode and looked at the fault codes there was a U2-40 code listed. Both of these code point at the eMMC PWB or the SCN PWB, the PWB that the eMMC is mounted to. When I opened up the back and removed the metal shield the picture shows what I found. The mounting standoff had come detached from the the board.
So if you are having similar problems, make sure you check this.
So if you are having similar problems, make sure you check this.