Mark71
01-01-2005, 10:41 PM
Hi,
First off, I am the furthest thing from a techie so ANY insight you can provide will be helpful. Several months ago I purchased a Panasonic 42 in HDTV (TH-42PX25). I have just gotten around to mounting and setting everything up and I'm now having some problems with picture quality/reception (more on that in a minute)....first, this is how everything is hooked up:
1) HD cable box to TV via component cables (25 feet of cable needed to run behind the wall over to the cabinet. Optical audio through Denon receiver
2) DVD player to TV via HDMI cable and optical audio through receiver.
Now for the picture problem. I've noticed that when watching cable TV, there are several light green and purple horizontal lines that slowly run up the TV (much more noticable at night and on dark backgrounds). It is worse with non-HD channels but still slightly apparent with the HD channels. Note that this "noise is still apparent even when the cable box is turned off (TV still on of course). Also note that the picture quality when playing DVD's (via the HDMI cable) is excellent.
So I'm not sure what is causing the problem, I've taken the cable box down to a SDTV and this dosen't occur, also when I hook the cable box up to the HDTV via a spare 6' set of component cables, this dosen't seem to occur. Could it be the component cables are bad? That is what I thought until I tried another connection, hooking up the cable box to the HDTV via the video coaxial port and the same (actually worse) noise occurred....
Any thoughts? Is this the TV or the cables? Thanks again, any help you can provide would be great!
Mark
First off, I am the furthest thing from a techie so ANY insight you can provide will be helpful. Several months ago I purchased a Panasonic 42 in HDTV (TH-42PX25). I have just gotten around to mounting and setting everything up and I'm now having some problems with picture quality/reception (more on that in a minute)....first, this is how everything is hooked up:
1) HD cable box to TV via component cables (25 feet of cable needed to run behind the wall over to the cabinet. Optical audio through Denon receiver
2) DVD player to TV via HDMI cable and optical audio through receiver.
Now for the picture problem. I've noticed that when watching cable TV, there are several light green and purple horizontal lines that slowly run up the TV (much more noticable at night and on dark backgrounds). It is worse with non-HD channels but still slightly apparent with the HD channels. Note that this "noise is still apparent even when the cable box is turned off (TV still on of course). Also note that the picture quality when playing DVD's (via the HDMI cable) is excellent.
So I'm not sure what is causing the problem, I've taken the cable box down to a SDTV and this dosen't occur, also when I hook the cable box up to the HDTV via a spare 6' set of component cables, this dosen't seem to occur. Could it be the component cables are bad? That is what I thought until I tried another connection, hooking up the cable box to the HDTV via the video coaxial port and the same (actually worse) noise occurred....
Any thoughts? Is this the TV or the cables? Thanks again, any help you can provide would be great!
Mark
