Connect a dummy load and parallel a voltmeter on this load 45.

The Konka F2979D TV cannot be restarted when in standby mode.

Analysis and Maintenance: Based on the symptoms, it is determined that the protection circuit is functioning normally. Disconnect L906 and connect a dummy load, paralleling a voltmeter across this load. Upon turning on the device, the +B output voltage measures 115V, indicating that the control system is normal but there's an issue with the line output stage. Inspection reveals that the flyback capacitor is working properly and VD452 is in good condition. Further examination determines that the line oscillation crystal Z161 is damaged.

Repair Method: Replace Z161, and the fault is resolved.

Source of Information: http://blog.sina.com.cn/kangjiadianshi