Screen is filled with a circular Red/Green/Blue pattern
Almost 2 years ago now, we bought a 30" Samsung Dynaflat TXR3065W CRT HDTV. About a year ago we decided to move our room around, and when we finshed and plugged the TV in and turned it on, there was a circular red/green/blue pattern. It was a weekend, so Samsung technical support was closed. I left the tv unplugged for the weekend, and on monday before calling tech support, plugged it back in and it was fine. Now, a year later, we just moved and after the move, the same thing happened. After it had calmed down for 24 hours or so, we turned it back on and there were two blotches in the top left and right corners. on the right was a green blotch, and on the left, a blue one. so, this didn't go away after a couple days so we decided to live with it until we could afford a new TV. During the second night of watching the set with the blotches in both corners, the TV made a weird noise so we turned it off. After letting it settle for another day, we turned it on only to find that the red/green/blue circular pattern had returned. Now, it's been a week and it's still there, making it totally unwatchable, and leaving our $400 HD cable box sitting there collecting dust. Since this is a CRT HDTV, is it even worth getting it fixed, or should we just go and pick up a LCD or DLP/LCD Projection?
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an internal degaussing coil circuit is already installed in the unit to neutralized color pattern...a loose solder connection may have caused this because as it operates temperature increases between the thermistor..
you have a shorted green CRT that is affecting the other crts the short is internat to the crt that leaves what is called retrace lines. if the set is more than three years old then replace all three guns.
Is this an Analog TV with a picture tube? If so, it sounds like the screen is magnetized. Have you had any magnets (including speakers) near the screen?
Inside all analog TVs is what is called a degaussing coil. When you turn on the TV for the first time (cold), the degaussing coil is energized for a couple seconds to demagnetize the screen and then it goes off.
You can purchase an external degaussing coil and demagnetize the screen youself. A degaussing coil looks like a small hula-hoop about 6-8 inches in diameter with a AC line cord attached. I've even made these coils out of long lengths of enameled wire, electrical tape and a line cord.
Once itas plugged into the wall outlet, you hold it close to the screen (1/2' away) with the hoop facing the screen and move the hoop in a circular pattern, covering all areas of the screen and slowly move the hoop away from the screen while still moving in a circular patten until your about 2-3 feet from the screen.
If you did it right, the color splotches will be gone.
Let me know if I can be of further assistance to you or help you to locate one of these coils.
If it's not yet a year old it should have some warranty - take it to the shop.. It's probably the HOT (Horizontal Output Transistor) which have been a problem child in this series all the way back to the TXP2745... But don't even crack the case on this one if it's that new - labor might not be covered but parts might. In any event replacing the HOT is not a difficult or expensive job.
This might be a proble with athe green electron gun having a short between the cathode and the grid. This problem require the use of a device called a picture tube rejuvenator. to test and if need be clear the short.
sorry silly girl seen this a hundred times!! The crt socket on the set needs to be carefully taken off and cleaned with wd-40 or tuner wash. its an intermittant connection on the screen contacts and the contacts that bias the grids.. It can be a green haze a blue haze or a red haze. Very common on 3 to 5 year old samsung tvs. Good Luck