Roland Forums

Hello musical people,

my boss me 25 was working fine until today when i plugged back the power supply (9V) and it doesn't start up. All i can visually see is, while I'm plugging in the power supply into the DC IN socket, the board lights up for a split second and once the plug is in completely, everything goes off. My adapter has a dual polarity thing and I've tried it the other way around as well (this ones got no response at all, so i assume the first one is the correct polarity). Its so frustrating especially now when I've had my dose of the herb and no medium for me squeeze out melodies!

Any suggestion? many thanks!

Is your guitar lead pugged in? as that operates thr on/off switch.
Also connecting reverse polarity to electronic devices generaly toasts them permanently.

The short flash may indicate a failure of the power supply, a failure which may have saved you from the abovementioned toasting.

Disconnect the power supply and put batteries in. Plug in the input cable -- does it work now? If so, wipe the sweat off your forehead and replace the power supply.