My RC-50 suddenly won't power on.

SOURCE: guide on RC-50 won't turn off

First, you need to select one of the patches called "init patch", it won't have a drumbeat on it. Then, turn the guide on again, then all the way off. Even if the knob's in the off position when you go to the patch, it'll turn itself on again by default. There's a light there that says "beat quantize" that you want to be off, or it'll cut your loop to the length of whatever beat it's set to. If you want to change the default, turn the beat quantize off, then press "write" and write the new patch. Hope that helps.

SOURCE: How To Turn Drum Beat Off

From what I remember from my recent tinkering you press the guide select button. Then either use the patch/value know and parameter buttons, OR it may be the guide level knob to switch the volume down until it is off. I believe I then saved the patch to preserve the setting and keep that irritating guide at bay! It really should be more intuitive, ideally knod turned to zero = OFF. But no. Ah well, hope you get it sorted. I have a problem too, maybe you have same one? It may be the unit itself. Search - Beggining of loop missing on FIRST playback - if you get a chance. Let me know if yours does it too?

SOURCE: Beggining of loop missing on FIRST playback only, on Boss RC-50.

Ok, solved this problem by visiting roland U.S. site as the help offered in this country is useless. The instructions given by email would not have worked even after the update was installed. Luckily, there are instructions that come with the download. If you have same problem as me go to http://www.rolandus.com/products/productdetails.php?ProductId=772&tab=downloads&skip=true

and update the opperating system on the RC-50 to RC-50 System Update Version 1.01.

Then hold loop sync and phrase 2 button (think it was phrase 2) to change it to sound priority mode. Then it will play back correctly what you recorded on the first loop, rather than missing the first beat.

Am v.happy I have found this, as after much searching I can't find any other loopers out there that offer 3 seperate loop tracks and the ability to switch between them effectively. Plus, it's a very convenient size, better than a load of rackmounted stuff to haul around.

However.....

Another problem..

When hitting the reverse switch ( I assigned both external footswitch and the onboard Tempo pedal to reverse) the change is not instanteaneous. There is a second or so delay before it plays in reverse. Not a problem for most, I suppose, but I have a piece that switches rythmicaly between playing forward and reverse which means hitting a pedal in time and reverse/forwards changing immediately. I think they could do with another software update to solve this. Now I have to keep room in my enormous pedal board for the old rc-20, as that does the reverse as it should - when you hit the flippin switch!

SOURCE: cannot get my RC 50 to factory reset.

Here is the latest update:http://www.bossus.com/gear/productdetails.php?ProductId=772# Click on download. Their support number is 323-890-3743. Hope this helps.

SOURCE: My Boss RC-50 has stopped working. I used the

CHeck the voltage out of the adapter. It should be around 9 to 11 volts. If it is not, it is possible that the OC3 has reversed polarity AND a protector that put a short on an incorrect supply. If so, it could have damaged the RC50 adapter. If the RC50 adapter is putting out correct voltage, then I suspect the inout connector on the RC50 may be damaged or not quite seated. Visually inspect the connector first.