My AP-620 will not start up. It only states "Please Wait..." I tried performing a factory reset per the manual, multiple time, waiting 15-20 min each time. However it only display's "Please Wait.." The LEDs under the buttons do turn on in sequence as it is stating "Please Wait..", but one they are all lit it never goes any further. On some forums it stated that there may be a ROM which can be flashed to restore the keyboard?
Does anyone have an answer to this issue? It is old and heavy enough to not warrant an official casio service.
Does anyone know were I can get the AP-620 service manual?
