Toshiba HD-XA1KN Service Manual page 14

3-10. Front panel keys/remote control are disabled.
3-11. Other Symptoms
Improper LAN connection
LAN depends on the quality of the environment and lines to which LAN is connected. Check the main unit as well as
network settings, cables, and connected devices.
Improper CONTROL pin connection
Use a serial cross cable to connect the unit to a PC.
Check the above. However, if the problem still remains, the digital unit may be faulty.
START (10)
Front LED lighting?
Yes
PJ7 connected correctly?
Yes
Failure of digit unit
No
No
Check and replace PJ7 FC cable.
Change power unit.
Replace front unit.