My tv is showing a white screen with flyback lines.there is picture in the back ground and there is proper sound.please advise what to look for.It is a
Daewoo Daytek 74cm crt tv.the model printed at the back is DCT-7499.
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Lines means Screen Drive is overdriving, try adjusting the Screen control on the FBT flyback Transfomer, adjust it down. If that does not Clear out Problem then replace the CRT Board that is connected to Picture Tube.
The Flyback i'e the circuit board on the back of the tube as thus malfuctioned and give you this white line with sound.. If you did not have sound we would be discussing the PSU "power supply unit" This fly back for a 27 inch will run $105 plus tax.. The installation thereof would be done by a technition witch will charge 15 to 20 per hour.. Okay here is the sad part you can recycle this TV and get a flat panel for much cheaper then it would take to repair this unit "i am just telling you the truth" But do not shoot the messangero n this one, since I did tell you you're proble could you leave a rating?
there is a problem in the flyback section of the tv set. the fly back has two knobs, one for screen and the other for focus. use the screen knob to adjust the brighness. if it did not help, either check the capacitors around the flyback or change the fly back with a new one. good luck
help is here. back off that screen control tell them lines go away.
you have these things working Powersupply, Vertical, High voltage, sound, leaves video problem , go the the video circuit on schematic and find the video out transitor or ic or whatever they use, check to see if proper voltage or better yet see if got video with a scope, I see allot of shorted video out transistors.
also check and see if you can inject video with a vcr out to the tv in.
Your Having a Problem with the High Voltage Transformer in the Set,You can pull the Back off(Not Advised)And you will find two controls on the Flyback*The Flyback is the Unit that has a Red Wire coming out of it Going to the Top of the picture Tube,with the set on adjust the One contol that says Screen,Till the Picture is Normal....Good Luck
Flyback lines? Is the picture all white with no brightness control with faint horizontal faint lines? If this is what you are saying, the screen voltage could be bad, and if thats the case, the picture tube or the flyback itself could be bad. You could also have a bad connection on the crt socket
sounds like you have a vertical sweep problem. Where the fault lies cpuld be the vertical output IC the verticle b+ feed, could be the capacitors in the vertical circuit?? Your gonna need to troubleshoot thr vrtical circuit if your not a tech thin my advise is to take the set to a pro for sn est. Good Luck