Hi all,i have the above radio,it has developed a wierd fault, programing is done via the rj45 mic port it ie frequencys ctcss etc,now whenever the mic is plugged in it goes into programing mode,i have the service manual but it doesent include the schematic of the mic,its a powered electret mic ,i have a spare mic for it that i used the coily lead from to make an ethernet cable extension,when testing i found two of the wires shorted,its wierd as it looks fine,any ideas,or a link to a mic schematic as its not clear if its supposed to be like that and no signs of any joins anywhere,unless its in the thick grommet/ strain relife part where it entered the mic body,both mikes used to do the same when plugged in,as in putting the radio into programing mode,its very odd.