This machine does not meet the tuner, the display can start; Connect the PC monitor can also be turned on, and the image is normal; What display signal source is not pick up, can also be turned on. Only a display and a tuner connection, the display can't boot up. Press the switch can hear the sound of the relay and, but a few seconds, relay but release. 77xservice manual download site
 77xservice manual download site
On the phenomenon of it, like the tuner problem, but after replacing the tuner, fault, fault was eventually determine the PDP display. 77xservice manual download site
 77xservice manual download site
Because connect a PC to boot, and answer the TUNER can't boot, the first change H board, fault, and change J board, fault has not ruled out. The last change D board, troubleshooting.77xservice manual download site