HD DVR is connected at one time on components AV1. This gives me nice picture for the lower channels but HD channels are coming in Zigzag lines. Changed input to the HD input AV4. HD channels are coming in clear but lower channels are Zigzag lines.
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Which generation playstation are you referring to The PS2 or PS3. The PS2 would be connected with a composite cable by default i.e red white and yellow cable. Connect the cable to the corresponding input on the TV, match color codes. Switch to correct input by using your remote controller. Press the AV button and a list of inputs come's up.Select av1 or av2 and check if you get a picture. If you use a ps3 then same as before press AV button on remote and select appropriate option on screen HDMI,Component or Composite.
Since this is an older first generation (1999) HD TV it may not be compatible with newer HDTV receivers because the standards back then were different - Make sure the HD cable box is plugged into the HD component inputs on the back of the TV (not the DVD inputs) and that the menu setting on the TV is set to DTV (not RGB) video. This TV will only accept 480i and 480p signals on the DVD input. Also the HDTV input will only accept 480i,480p and 1080i (it will not work with a 720p signal,make sure your cable box is not set to that mode)
I am having a similar problem with the inputs. I have a cable box plugged in to cable antenna, DVD to video 6 using HDMI, Mac computer plugged in to video 7 - using HDMI (TV does not recognize this) and then Nintendo Wii hooked up to Video 1. My problem is that Sony only realizes 2 additional components like the video 1 (wii) and DVD on video 6, it does not play the other components. I have to niw manually switch the cables to have them work...
is there anything else hooked up to your tv other than cable or satellite? if no other components (dvd, vhs, etc) then you will get a snowy screen because the other inputs are for other components that are hooked up. a picture is showing on the HD input because you have cables hooked into that input.
MY Sony (same model) has OUTstanding picture resolution and quality., I never have blockiness on any of the sports channels. I would say, give Comcast a call and complain about their signal.. they have a tech come over for free diagnostics on your wiring..