My Datameter 1000 fails to switch on even when plugged into mains!

My Datameter 1000 fails to switch on even when plugged into mains!

LogIT World Support solution: This will be the battery contained on the PCB which once expired prevents the Datameter from turning on.  LogIT World can offer to supply the battery allowing customers to self fit it (bit of soldering knowledge required) or can perform the work if contacted.