Gtech AirRam Power Switch
That is one of the common faults with these Gtechs the power on/off will fail and need replacing.
This switch will need to be replaced by someone with soldering skills.
Fit the following;
AR01
AR02
AR03
AR05
AR09
AR20
AR29
AR30
K9
MK1
MK1
Quantity: 1 Switch Button