TCL channel blocked - TCL Televison & Video

repair shop time many things happen that diyers never saw even once in a life time

Is there a reset button? Have you contacted customer service at TCL? Check your manual?

You can use the RCA style jacks, Yellow for video White for left and red for right audio OUT . Connect the TV end the same way. Note the source input number on the connectors of the TV. Turn both the TV and the Sony on. On the TV, select the input number the cables are connected to and you will see the Sony . If there are no unused places on the TV to connect to then take off the antenna/ cable wire off the TV and put it on the ANT IN connector of the Sony. Obtain a jumper cable wire long enough to reach the TV from the Sony and select either channel 3 or 4 whichever channel is not used in your area on the back of the Sony. Now turn both on and select TV as the source and put it on channel 3 or 4. Now turn off the Sony and change the channel on the TV to any other one in your area. If there is no picture, then the Sony will have to be on while watching TV.

please confirm brand and model number so I can assist you

how to upgrade my tcl lcd tv l24d10f? can u give me a firmware?

I have exactly the same problem with my TCL HD television. Previously worked ok but no amount of rescanning the channels will restore the picture. :(

Is channel 9 offered in DTV?

Call TCL for a firmware update, which will fix the problem. They will send it out for free, along with a serial cable. You will need a PC or laptop with a serial (RS-232) port to perform the update.
The issue is that WIN, GO and GEM are broadcast on a frequency off-set by 125kHz from normal. TCL TVs cannot tune to xxx125kHZ, only multiples of 500kHz.

A firmware update from TCL will fix the problem. Call them and they will send out the firmware and a serial cable (required for update) for free.
I did the update yesterday and it fixed the problem (sound but no picture).
You will need a PC or laptop with a serial port (RS-232).