Question about Konka K3290U 32" TV

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No picture no sound

When turning on my Tv worked good but about 20 minutes it sounds crack then off suddenly.I unplugged it .Staying away for 1 week.I plugged again.It worked and then off as before , after 15 or 20 minutes later

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Something in the set is getting hot. there is freeze spray you can buy at electronics places.
open the set and run until it fails... spray a few components in the power supply and deflection.
see if it stays running.
warning in a C R T set the high voltage can be 28kvolts or higher .it can hurt or kill you.
the horizontal drive transistor runs on 160vdc and has spikes of over 2000 volts to drive the flyback transformer.
unless you really are knowing,it is best to stay out,they are dangerous

Posted on May 13, 2009

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Posted on Jan 02, 2017

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My FINLUX tv flashes on standby 5 times continuously until it turns itself off...no picture or sound?


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Diagnose the Problem

The first step in diagnosis is to check the display for any cracks on the screen. If the screen appears cracked, then the repairs may require plasma screen replacement. A cracked screen means that the gases inside have probably escaped. There is no way to refill the gases and the whole display will have to be changed. In this case, an authorized service may be able to provide more details. If the problem persists, then a gas leak is perhaps not the cause of a loss in display. Lamp burnout could be one reason behind a blank screen.

Check the Fuse

Most of the time, the plasma TV fuse is at fault for no picture on an LG Plasma screen. In such a case, changing the fuse should make an LG Plasma TV functional.
  1. Unplug the TV and wait for 10 minutes for the capacitors to discharge.
  2. Take a Digital Multimeter and set it to the 0-200 ohm range.
  3. Touch the red and black probes to each other and check the readings. The multimeter reading should be in the range of 0-2 ohms.
  4. Now touch the red and black probes to each end of the fuse. If the multi-meter reads '1' or 'OL', then the fuse has blown and needs replacement. If the multi-meter shows the same reading as before, the problem lies elsewhere. Some cases may require the motherboard to be completely replaced.

Fix the Problem

If an LG plasma TV has no picture and no sound, then either the Y-sustain or the Z-sustain are at fault. Follow these steps to determine and fix the problem.
  1. Unplug the TV and wait for 10 minutes for all the capacitors to discharge. Then open the back panel of the TV.
  2. Unplug the Z-sustain from the TV and plug the TV into the power supply. If there is sound, then the Z-sustain is faulty and will need changing.
  3. If there is no sound, follow the same procedure and unplug the Y-sustain. Check for sound. If there is a sound, then the Y-sustain is faulty.
  4. If the Y-sustain is faulty, a user may have to check the Y-buffer. He will have to follow the same procedure and unplug the Y-buffer this time. If there is some picture with sound, it means that the Y-buffer is faulty.
Keep in mind that a plasma TV runs on very high voltage. The voltage on some connectors exceeds 400V (in excess of 200 joules of energy). This high voltage can be very dangerous. That why it's important for users to always make sure the capacitors have discharged before performing any type of diagnosis or fixes on an LG Plasma or any other television set.

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My tv is not working right with picture.


Press the TV button on the remote, make sure the TV is plugged in, check the electrical outlet to make sure it is live if the TV does not turn on. If these actions do not solve the problem, press the Power button on the front of the TV. If the TV turns on, replace the batteries in the remote control and reset it by pressing the number 1 button for 60 seconds. If necessary, reprogram the remote.


Unplug the TV for two minutes, then plug it back in if the buttons on the remote don't work. Make sure the remote is in TV mode.


Change the settings on the sleep timer if the TV turns off unexpectedly. Unplug the TV and wait five minutes before plugging it back in if necessary.

Check your antenna connections and cables if the sound is okay but the picture is poor. If all the connections are good, adjust the sharpness function.

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Hi just wondering if you can suggest a repair for my LG42PC1DV-AA. We have had the TV for 4 1/2 years. Last week when my daughter was watching it there was a loud crack and the screen went blank. After I...


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It sounds Lamp is dead in your TV, how old is this TV and did you replaced its lamp recently?
Click Part Store to see required lamp image and price info.

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1 Answer

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Hi, Probably you first have to determine if the "no sound" is the TV or your source (cable box). Try another source such as a DVD player hooked to the audio/video inputs of the TV, if still no sound then you have confirmed that it is the TV, if there is sound, then it is the cable box (in some cases it may be just the cables connecting the cable box and the TV; try wiggling it a bit, might just be loose). If it is the TV, go through the routine of the setup/menu; look for audio, stereo, SAP, etc, try different settings (pls log down original setting in case no change and you have to revert back). If all else fails, try the "thump test" this will help you determine if its a loose/cold solder problem inside the TV. Give your TV a good whack at the side, top or back, if sounds comes on even briefly, it's a loose/cold solder problem, if not then you probably have to have the unit serviced by a qualified professional. Good luck and kind regards.

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