NH TS115 dash fault

[stroller]

On my TS115 the PTO warning buzzer is sounding continuously, its the high pitched one in the clock/light cluster, definitely a fault on this and not the wiring or switches as it shows the same fault when put on another tractor, any ideas before I send it to David King electronics?

 

[forblue]

Maybe a diode gone but you would have to find it first..