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can u set your dvd pleyr in your av mode
if not did then u cant see any channels so put your dvd plyer pin in to av mode its bhind tv or front side there is 2 socet come one for video other for audio
so & start av channel in your tv
I don't think there is any problem with your TV. I think problem is from your cable receiver or antenna depending on the cable network that you are using.
To confirm, connect your TV to a DVD player and let's see if there is going to be sound and picture on your TV. If TV works perfectly with the DVD, then it means your antenna or cable receiver/decoder needs to be check. There might be a temporal network problem with your network provider.
Let me know the outcome of connecting the TV to a DVD player so that I can tell you the way forward.
let me know first what is your source of the signal: from cable TV, from antenna or from video source like dvd and vtr or any deck? if from dvd or any video source are u using rf cable or av cable (two wires) one for audio and other for video if it is this wire try interchange audio to video.
next at what time you miss the picture during watching tv through antenna or cable or during using video sources?
Did you change any of the 6.8 ohm 1watt resistors with the ICs? That chassis always blows at least two of the 6.8 ohm resistors often four of the 6.8 ohm. And you cant always tell by looking at the resistors , they have to have one side unsoderd and lifted from circuit. There are 11 of them 3149 - 3160 are the 6.8 ohm resistors that need to be checked.
How are you connecting the DCD payer to the TV? If by chance you are using a DVI cable then you have to run the audio cables seperate from the DVI as DVI only sends video information. HDMI on the other hand sends picture and audio information on one cable.
alot of sets turn solid blue when the signal is lost . check your antenna or cable inputs might be chewed up by pets mostly.
try feeding in a dvd player, or VCR signal and see if that plays on channel 3 or 4 ... if not you might need a new tuner.
The color wheel bing noisy is a common problem iyt will eventually give a negative type picture, Loewe have now a solution to service this without replacement,I haven't tried it yet but I have one in the wirk shop to do. The second issue is probably a signal board issue, the tv handle menu systems differently from AV inputs. Loewe do part exchange prices on signal boards.
Before you change the signal board test with an AVS input from a camera or something, earlier models were sent out before Loewe had a license for HDCP and this can also cause the problem of no signal.