Panasonic DMR-HW220 no picture on tv - Computers & Internet

See the Troubleshooting section (Page 68) of user manual
sqt0993.pdf (panasonic-europe-service.com)
It may help you.

Please check your Blue and Red component cables on both the recorder and your TV. One is probably loose.

So you have looped the coaxial through the Panasonic to the TV and have a HDMI from the Panasonic to the TV, right. When you turn on the DMR select the appropriate HDMI connection with the TV remote and you will be OK.

Hi
This all depends on how you connected the two. If you used the component cables then you've forgotten the audio cables. If you're using an s-cable then you've bent a pin or the connector is not centered. If you're using an Html connector then the cable may be bad but my money is on the DVD player being bad.

Dry joint - faulty capacitor on the PC board of the decoder. Found by wiggling the components and resoldering

Make sure the scart lead is fully in on the tv and the dvd,this can cause pic no sound or sound no pic

Change the AV settings on the DVD or TV to be the same format. Feeding AV into an AV-S gives B&W

problem solved.
just used av2 socket on tv instead of av1

That's normal with different region signals. Only a multiregion recorder/player combo will transfer properly

Are you using the component (RGB) outputs, and a Sony TV? I believe that there is something in the output of at least some Panny DVD recorders (over the RGB component path), which Sony TVs don't process properly.