Ditto looper has stopped working with power supply

Ditto has stopped working with power supply

I have a and when I first got it, it worked great with my Dr tone power supply but suddenly it wouldn’t power on when I tried to start a loop (no Led will turn on when I press the switch) I’ve tried using my friends on the same power supply and it still wouldn’t work. If anyone can help it would be appreciated.

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Source: http://forum.tcelectronic.com