Question about Daewoo DTQ-20U4SC 20" TV

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Rolling lines a only a few stations

HELP!!!! I have tried everything. I have had this TV for about a year and I have rolling lines on about 5-7 channels (i.e. 25 (VS), 36 (TBS), 59, 62, etc...) I have checked cable wires and other TVs and the problem is only on this TV. Any suggestions?

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Re: rolling lines a only a few stations - Daewoo DTQ-20U4SC 20" TV Standard (CRT) Televisions

Check for other appliances near t.v.

Posted on Jul 05, 2007

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Zenith C27A24T 27" TV -

hit your TV lightly on left side or right side or on top & then observe will get normal picture or it comes & again it goes....if it is happening like that then following is the situation..........after 4 or 5 yrs in some TVs on main board (also on circuit board that is fixed to CRT TUBE ) at some soldering joints crack develops....then due to loose contact picture becomes small in size or disappears or rolls ( in your case )...........when we hit that lightly then those loose contacts joins temporarly & again picture appears for some solution is ......TV main board should be observed carefully & most of the joints should be re-soldered.......only a good service engineer can do that........even after hitting TV lightly if there is no response then main board has to be checked your case iam sure it is loose connection problem.........joints should be re - soldered ...100% it works again................this problem cannot be solved by user unless user has idea about components( resisitors, transisitors, diodes,...etc) , have soldering iron , multimeter & other contact good TV service engineer

Apr 21, 2011 | Zenith C27A24T 27" TV

3 Answers

My dlp samsung has slanted vertical lines on most stations but not all. what is causing the lines and is it something i can fix? tv is about 5 years old

Do you have cable ? and is it only on local stations ?
Call your cable company to check the lines. I had the same problem they came out and fixed it free of cost.

Dec 20, 2009 | Samsung DLP HL-P5663W 56" TV

1 Answer

I cannot put in tv stations manually the auto search doesn't pick

cant help you there, Most TV's have a little flap you lift up to access a little wheel and switch that has 4 regions you start at 1 and roll the wheel till a station is found and is cleasr to view. then move on to the next set of switch and wheel to rotate that to get a different channel. If your TV does not have this manual input then you can only do it from either the remote or some buttons on the TV itself

Jul 30, 2009 | Standard (CRT) Televisions

1 Answer

Can't recieve any stations

The remote would need to reprogrammed for the other devices. It loses its programming when the batteries are replaced. There may be a model number on the back of the remote or under the battery cover. With that information you can probably find the instructions on the manufacturer's website. Or you can purchase another remote if all else fails. They're pretty inexpensive.

There's nothing the remote can do that would affect your TV unless you hit one of the buttons, possibly switching to another input. Unplug the set and let it sit a few minutes. Plug it back in and go through the initial setup again. This should bring everything back to normal for you.

If you're still having problems, please post a followup comment and I'll try to help more.

Apr 22, 2009 | RCA F36690BC 36" TV

1 Answer

Rolling lines on screen

Sounds like the power supply has a bad capacitor. This problem can inject excessive 60 hz from the AC line into the vertical stabilizing picture system. The hum also my come from the same reason, bad or leaking filter capacitors. Cheaper just to buy a new TV or borrow another TV and connected to your system to see if the problem still occurs.

Mar 16, 2009 | RCA F36668 36" TV

1 Answer

Rolling lines a only a few stations

According to your post you seem to only be having the problems on the UHF channels. I would need to know what your source is IE: Antenna or Cable.

May 01, 2008 | Standard (CRT) Televisions

1 Answer

Local tv channels come in snowy

you have cable and the stations are still snowy? could be tuner do you have a box or directly hooked up to tv, try unhooking box if you have one and directly hook it up to tv if you havent already done so

Jan 21, 2008 | Zenith C32V37 32" TV

1 Answer

Faulty tv picture`

this is due to loose contact in power supply.

it might be due to some capacitor or print loose in supply.

please also check your plug & socket for loose.

it is not a major problem

good luck.


Oct 14, 2007 | Standard (CRT) Televisions

1 Answer


I've worked on a few of these sets and have found C2P08 to cause something like rolling bars in the picture and have found C2P05 to cause lines jumping in the picture.

Feb 10, 2007 | Mitsubishi VS-60607 TV

1 Answer

Thin vertical line

What you have described is definitely some form of Electrical Interference. Interference can come from a variety of causes. Is the Cable Inputting the Cable Box close to some High Voltage Electrical Lines? Or Are you located near some Electrical Power Station? Or A Police station, where the Radio Transmitter of the Police Station causing the Interference? As I said, there are a variety of reasons. Also, Try to check if the connector is loose at the rear of the Cable Box, or at the rear of the TV. You will have to eliminate every possibility reason. Wish i could help further.

Jan 21, 2007 | Mitsubishi CS-35405 TV

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