The TV turned on for a second then there was a pop, and the TV will not come on now. I can hear a little buzz about every 10 seconds, like it is trying to come on, but the power light shuts off and it tries again, and again. I do not see any visual problems, however when I plug the TV into the wall socket there is a small spark. I check the only removable fuse, and it was fine. Any help would be appreciated. Thank you.
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Re: TV is not coming on.
The model you have has a very common problem and that would be the main Hi-voltage transformer (the flyback) , the horizontal output transistor, Horizontal drive coil between the secondary of the horizontal drive transformer and the base conection of the horizontal output transistor and/or the resistor that feeds the b+ to the primary of the horizontal driver transformer. All or part of these will be the bad componets. Now if you have never had any experience replacing solid stse componets then you should leave this reapir to the pros, as there will be soldering involved as well as the HI voltage safety issues to deal with. Good Luck
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I turn on my DYNEX LCD-TV model
DX-L26-10A and the screen says 'Please Wait" for a few seconds and then
I hear the voices for the channel, but there is no picture and there is
a buzzing sound coming from the back of the unit.
Hey John, I am experiencing a very similar problem. If I unplug the TV when it is on (green light) and plug it back in. It begins green, and clicks to red. I immediately turn the TV back on with the remote. Most of the time it seems to struggle for several seconds, sometimes with a little scratchy audio popping in and out. It will then go from green to red on the TV and if I try to turn it back on it will go green for a few seconds and back to red but without any click coming from the TV. No matter how many times I try after that, no TV. If, on the other hand, I unplug while green, plug it back in and with the remote turn it back on after it has come up green and then clicked to red, it will come on. It might take thee or five times but at least it comes on... If you hear of a real solution, please let me know ([email protected]) in the meantime, best of luck.
WHEN THERE IS A BUZZING NOISE IT MEANS THAT ONE OF THE INTERNAL COMPONENT HAS FAILED .RANGING FROM A SMALL DIODE TO LARGE PARTS LIKE THE MAGNETRON OR TRANSFORMER OR CAPACITOR. IF IT IS 10 YRS,OLD YOUR BETTER OFF GETTING A NEW ONE .BECAUSE YOU COULD INVEST MONEY IN THIS ONE AND HAVE SOMETHING ELSE GO TWO DAYS FOR NOW.WITH A NEW ONE YOU ALSO END UP WITH THE NEW WARRANTY. HOPE I HELPED. KEN62 GOOD DAY!
Check the start capacitor. You may be able to see visual deformaty, otherwise, use a meter. The buzzing is most likely the contactors closing which uses a seperate 24v supply..
Someone else gave me the tip as I had the EXACT problem, but no buzzing. Unscrew the panel on the front bottom of the tv. Once that is off, there is another screw that opens a little panel. Unscrew the single screw with an allen wrench and pop out the bulb and casing. Mine was full of dust etc. Used an LCD cloth, but compressed air would do the same thing, put it back together and it works great!
You are hearing the spark gap mounted on the lamp ballast board. If you can hear that sound, that means everything in the lamp driver circuit is working except the lamp!
If it's between 5-10 secs, that's normal. You will turn the tv on and hear a loud (buzz/hum) that is the picture tube firing up, once it's fired up, it has a few more seconds until your picture comes up fully. That is about 5-10 secs from pushing the power button.
If it's taking longer than that, your picture tube may be going out.
I had a 36XBR250 and it took about 10 secs to fire up and show a picture, and it was 5 1/2 years old.
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