Hitachi57projection tv when dvd is hooked up, have sound and no picture.

your RCA jacks from the DVD player....should be connected to the Vizio a/v 1 in the back of TV (yellow to yellow, red & white to red & white)... now to view using the remote to TV switch to a/v (play a DVD, you should now have a picture and sound)

if you have a picture on the tv from normal channels and/or cable, then i would suspect the scart lead may have a bent pin at one end or both or is not inserted fully.

Bad capacitor behind FBT 100uf 160v

Select Source button from your tv remote keep in AV mode than cheked if you have conected with yellow/red/white rca wire

Okay you TV is hooked to a comcast modem? or do you mean My tv is hooked to the comcast converter box? A no picture but sound you want to first check you cables also try hooking up a dvd to the tv and see if that picture comes on if not and you got no pic and sound this would mean the backlight on this tv is dead or you got a bad inverter not converter, inverter inside the tv. Meaning it needs the repairshop but try and hook up a dvd to it and see if you got picture if so you cable box might be the issue call comcast!

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The common problem with it is that the Av plug you are using is fault, you have to purchase a new one. Or maybe you plug the one of picture into the tv's "video in".

try to change tv video format from PAL to NTSC then vice versa.

Well, i had a look at the back of that Toshiba TV - make sure that the red, white, and yellow cables are hooked into the Video-1 slot of the Toshiba and that the Toshiba channel is changed to Video 1.
Then check your nameless DVD player and make sure the red, white, and yello cables are all hooked to OUTPUT slots that are in the same column or row - if I had you DVD manufacturer and model #, I could suggest some additional steps to check. Also, make sure your dvd player is in dvd playback mode.

-Tha Mp3 Doctor

look carefully whether you jacked the audio out from DVD and audio in into the TV
> the TV is having a Audio out and in jacks
>if you jack a the audio out from DVD into Audio Out in TV you wont have audio

You need to set up the out put of your DVD player. First hook up a non hdmi output to the tv, either component or coax. You don't need to hook up the audio. You should get a picture from this connection. Then you can go into the menu and set your hdmi output to match your tv, probably 1080i. You may have to turn your volume up higher when using the hdmi cable than not. I hooked my audio up directly to a surround sound and don't use the tv's speakers.