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My samsung crt tv 10 yrs old goes blank after working for some minutes making a cracking sound.it shows picture occasionally.any solution!

Posted by akindeled660 on

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The Knight

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  • Samsung Master
  • 76,698 Answers

EHT arcing takes place inside the TV. Clean the circuit board and inside components. You can use vaccum suction pump. Take care.

Posted on Jun 02, 2012

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5 Related Answers

SOURCE: tv screen goes black

No, if the picture of your tv screen is clear when when you watching. the troble of your tv is looseboard, and you replace your CRT socket too.

Posted on Apr 16, 2008

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Anonymous

SOURCE: JVC 27" CRT TV AV-27BP3 display shows single horizontal line

I have a similar problem on my CRT computer monitor (AcerView 76c). It is an old screen and I think it is just at the end of its life, much like your TV. Having some background in physics, I would be pretty sure that the problem is with the cathode ray tube's vertical deflection system. The horizontal deflection electrodes are working while the vertical one is not. This results in a display of a single horizontal line (or in my case, a few superimposed) in the centre of the screen. Where both X and Y (horizontal and vertical) deflectors fail then the electron gun firing would result in a single bright spot in the dead-centre of the screen.

So really, we have no choice but to move on and buy a new set as repair is probably just as, if not more, expensive than replacement with a new device. Seeing as your post was in 2007, I hope you managed to solve the problem.

Best wishes,
SZ (Sydney, AUS)

Posted on Oct 05, 2008

kberl73

  • 4 Answers

SOURCE: Sony projector kp53hs10

I recently had this same issue. If you remove the speaker pannel in front of the set, you will see a block with 6 knobs on it, just to the right of the center panel. This is called a focus block. 3 knobs on top which control the voltage going to each tube, and 3 on the bottom are for fine tuning focus for each tube.

If your problem is the same as mine, it is a convergence problem. and due to the fact that the picture is turning off, says that one of the tubes is not getting enough power.

NOTE: BE CAREFUL NOT TO TOUCH ANYTHING ELSE BUT THE FOCUS BLOCK, THERE IS EXTREMELY HIGH VOLTAGE WITHIN THE TELEVISION, AND CAN CAUSE SERIOUS INJURY.

1. Make sure the screen is blank, ex video 2 with nothing on. It's easier to tell.
2. very slowly, one at a time turn up the knob on the left top, should control red, untill you start to see lines come on the screen, then turn back just till they dissappear, and you see a black screen again.
3. continue with the second knob on top, just the same as the first.
4. And continue with the 3rd knob on top right just the same.
5. when you're finished, turn off the set, then back on, let is set for a min or 2, then hit the FLASH FOCUS.

If the problem persists, it most likely is a IC chip.

Best of Luck

Ken

Posted on Dec 03, 2008

Anonymous

  • 21 Answers

SOURCE: Panasonic Quintrex 32" 100Hz CRT

I had this problem on my 42" Philips. Just got it yesterday and worked fine on the tv stand. As soon as I mounted the TV to the wall via wall mount system, I had the exact same issue you did. Figured it out today.

The wall mount was putting pressure against the center of the back of the tv (tv set had a slightly rounded back plate, and the mount was a flat plate). As soon as I put spacers (part of the wall mount hardware set) between the wall mount braket and the tv so there was no contact except at the mounting holes, the tv worked fine.

My theory is the pressure pushed the tv back plate against some board components which caused them to overheat (no air flow); or put pressure on internal connectors. I dont know.

Hope this helps, may not apply to your situation.

Posted on Sep 18, 2009

Anonymous

  • 77 Answers

SOURCE: power up the tv after about 10 - 15 minutes

If this is CRT TV, you need to change the LOT(line output transformer) to fix this issue. This issue is due to overage of the television.

Posted on Sep 06, 2010

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My samsung TV UN70NU6070FXZC can't turn on, the red light blink 2 times with dark screen and no sound, and this cycle repeated after about 20 seconds again and again. What issue is it and how to do?. My samsung TV UN70NU6070FXZC can't turn on, the red light blink 2 times with dark screen and no sound, and this cycle repeated after about 20 seconds again and again. The Tv reboot again and again. Have to unplug power cord to stop it. Samsung Main board BN94-14106C, Power supply board BN44-01016A 1. Disconnect main board from power supply board: plug power cord, backlight on, output=13v ch1=120v ch2=80v ok. 2. Connect power board to main board disconnecting two connectors to screen, it can be turned on/off normally. No T-con board is found, is it included in the main board or side board? a. TV Standby: red light on, sound off, backlight off. on power board output=12v ch1=ch2=0v, on main board SW=0.1v PW=12vx2, HAVDD=AVDD=VGH=VGHD=0v FB_TRDY_3=0v. b. TV On: red light off, sound on, backlight on, on power board: output=13v ch1=124v ch2=82v, on main board: SW=3.3v PW=13vx2, HAVDD=AVDD=VGH=0v FB_TRDY_3=0v VGHD=0.1v. It seems that video part of the main board is not working? 3. Only connect anyone of the two screen connectors to main board connecting to power board, it can be turned on/off normally. a. TV Standby: red light on, sound off, backlight off, dark screen. on power board output=12v ch1=ch2=0v, on main board SW=0.1v PW=12vx2, HAVDD=AVDD=VGH=VGHD=0v FB_TRDY_3=0v. b. TV On: red light off, sound on, backlight on, dark screen. on power board: output=13v ch1=124v ch2=82v, on main board: SW=3.3v PW=13vx2, HAVDD=AVDD=VGH=0v FB_TRDY_3=0v VGHD=0.1v. It seems that video part of the main board is not working too? Maybe both of left-screen and right-screen be faulty? It seems not to be possible. It is same if only disconnect anyone of the four screen connectorsillustration tv . 4. Connect both of the two screen connectors to main board connecting to power board, it can't be turned on/off normally. Dark screen, red light&sound&backlight blink 2 times for 2 seconds then all off. on power board output=13-12v ch1=115-105-0v ch2=77-70-0vbacklight: lightness-a little lightness-dark, on main board SW=3.3-0.1v PW=13-12vx2, HAVDD=about 6-0v AVDD=about 10v-0v VGH=about 14v-0v VGHD=about 11-0v FB_TRDY_3=3.3v-0v It seems that video part of the main board is working now?. And then after 20 seconds the cycle repeats again and again!! I had to unplug power cord to stop it. I replaced the main board and power board, nothing changed.

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