I've seen other postings about distorted pictures, and mine is similar, but it only happens when I'm using 480p input. Whether or not the TV has been on, changing from another input source or a 1080i input source to a 480p input source gives me a distorted picture for about 15-20 minutes.
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Re: DIstorted picture for 480p input only
Many set have two differant convergance settings one for 480 and one for1080 this is because when it changes mode the set runns a differant frequencys, what may have happened is you have a cold solder joint somewhere that takes this fifteen minutes to corect itself, might want to start by resoldering the convergance and high voltage curcuits
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Sounds to me like the digital pixeling that occurs with a weak signal. You have not identified whether this happens on broadcast/antenna TV, cable or satellite service, or a video input such as a DVD. This can be a common problem if you have a weak signal on any of those inputs. In any case, blowing out the dust will not help.
is your RGB cables are the same output from your tv...are you connecting from where dvd cable box sattelite box, if you are connecting from a box exs output of cable box is what colour are you using? for your your output to your tv and what input are you using of your tv set.[input 1is it video input 1,] or comp? let me know...
Is the onscreen menu just as distorted and are the lines across it or behind it? The pop you heard may have been a capacitor and since the TV is still powering on, it's the probably the video controller board that is on it's way out. If the onscreen menu looks fine, you maybe having a problem with the input board only so try a DVD that uses a different input and if it's poor, I would say the TV needs to have the input/output board service. If the OSD is distorted as well then it's definitely the video controller board and service is likely required.
I just had my HD DTV installed this weekend, you have to leave it on 480p. I too purchased my tv in 2002. Per DTV, its an older model and you have to stay with the 480p to get the best possible picture. I have to admit, don't know what the 1080i looks like, but 480p is showing me a very good picture. Best I have ever seen on my TV.
On a Philips TV the only way I know to switch to any of the inputs is by scanning using channel up or down. This model is capabable of 480P input only at the CVI/Component input. This is not a HD television. It is only a EDTV (enhanced definition) if you try and input anything iver 480P IE: 720p or 1080i, the double image and/or lines is what you will get.
It's always nice to have pictures when diagnosing a set over the internet.
I've seen this problem before. I found CR14710 burnt and the focus block arcing from the bottom of the control.
The capacitor and other components in the circuit should be replaced as well. They only cost a few cents and damage to them is a possibility.
Hope this helps.