Hi, I had this same issue and managed to resolve it so thought I'd share my findings.
Process of elimination:
1. I tested the A/C adapter with multi-metre and this was fine.
2. I disconnected the phone cable and this did not fix the issue.
3. I opened the control unit (just 4 screws) and...
Hi, I had this same issue and managed to resolve it so thought I'd share my findings.
Process of elimination:
1. I tested the A/C adapter with multi-metre and this was fine.
2. I disconnected the phone cable and this did not fix the issue.
3. I opened the control unit (just 4 screws) and...