Garyt

Joe, thanks for the reply. I've been trying many different combinations of function + local / backup / usb / etc to no avail. I did mange to get it working twice 2weeks back but then it reverted back to this odd state when the mains were disconnected.

Hi. I have the PX750. Was doing OK until one day kids might have messed with it. It turns on fine, lights initialise but then i realise the power lamp is not lighted. I also get no sound. I've tried function / local sound etc but get nothing. I can't seem to enable operation tone either. One thing for sure, operation lock works (func+last key) Off and on it seems to be OK when I mess around enough with function+X but after I disconnect mains and try to turn it on again, I get this non operative mode. Can anyone tell me what's going on pls. Must be some midi/usb/local setting.... Thanks