If your A-PRO series (A-300PRO, A-500PRO, A-800PRO) displays "Ver.5.535 [ENTER]" or "Ver.1.150 [ENTER]", it has likely entered update mode. Follow these steps to see if they resolve the issue:
- Turn off the A-PRO.
- Adjust the bottom switches:
Locate the two switches on the bottom of the unit.
Set both switches to the “*” (star) position. - Turn the power back on to check if it operates normally.
If the same code reappears, the mainboard may require repair. Please contact the dealer where you purchased the product or reach out to our customer support via Roland Backstage (requires a free Roland Account).
Note: If Roland Backstage is not available in your region, contact a nearby authorized Roland dealer.