Question about Proscan 42LA30H 42 in. LCD Television

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Why does my tv have like a strobe like effect when i turn it on and only a clicking sound?

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My tv powers on displays the LG logo then makes a high pitched squeal sound from speakers and then flashes on screen (strobe light effect) does not display picture or sound.


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Dec 16, 2015 | LG 55LE5400 TV

1 Answer

HK AVR 125 display strobing and no sound, even in headphone jack


Hi...

Find someone that does TV or audio repair and have them open it up. A cable assembly may have loosened during the MOVE.

Cheers

Jan 30, 2014 | Harman Kardon AVR 125 Receiver

1 Answer

TURNING THE TV ON WHEN COLD THE PICTURE STROBES AND SOUND IS OFF ON OFF ON IF I ADJUST THE BACKLIGHT AND TURN IT BELOW THE MIDDLE (STD) ADJUSTMENT THE STROBING WILL STOP AND SOUND WILL COME ON IF I TURN UP...


Check and replace all the electrolytic capacitors at its main power regulator board and check. If it do not help you, replace the power board as card basis. It is a power regulator board problem.

Jul 23, 2013 | Televison & Video

1 Answer

I TURN MY TV ON AND IT HAS A STROBE LIGHT EFFECT TO IT. THE PICTURE WORKS GREAT ITS JUST HARD TO WATCH IT OR PLAY A GAME ON IT WITH THE STROBE LIGHT EFFECT


I've fixed several of these, easy fix, you will need to replace both 470uf 35 volt capacitors on the master and slave inverter boards. So you will have to replace a total of 4 capacitors. The capacitors themselves are about 50 cents a piece. The inverter boards are on the far left and far right of the set. You will have to remove the back cover to see them. If you don't have the ability to replace the capacitors, you can just order new inverter boards for $40-$60.

Dec 09, 2012 | Televison & Video

1 Answer

Flickering Sanyo LCD TV


There is some dry solder/leaky or dry capacitor in the board. I suggest it is better to refer it to a qualified service technician, since the back cover has to be opened for investigation/rectification.

Aug 22, 2012 | Sanyo Televison & Video

1 Answer

My Vizio is 4 years old. Last night when we turned it on it started flashing like a strobe light. It continues to do this. What is the problem? Thank you


We need to find out the strobe effect is due to the T-CON board is turning on and off or if the backlights is turning on and off. This can also be due to unstable power supply due to bad caps.
You need to look at the back of the screen to see if the light coming through on the back side of the LCD panel is stable when the picture is strobing.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.
Please leave rating if it helps.

Mar 04, 2011 | Vizio 42 in. LCD TV

1 Answer

I have a Samsung ln46c630 which was purchased in May 2010. For the last few weeks it has started to have a strobing effect. Switching the source sometimes fixes the problem. It will run fine for a while...


Any luck? We bought our tv (same one) in March of last year. It is doing the exact same thing. Time Warner has already came out and switched out the cable box and cables. We have a tv tech coming soon (contracted out from Samsung, of course...) Problem persists...

Feb 06, 2011 | Samsung LE40R72BDX 40 in. HD-Ready LCD...

1 Answer

Canon 580ex II strobe issue


This depends on the mode you have selected on the flash gun. If you have Multi selected you will get the strobe effect. The strobe effect is all so present to help the flash set the correct exposure. It's not a problem with the flash or the camera. Spend some time reading through the flash gun manual. I have to admit it is not always clear. Also try Youtube for a video.

Sep 21, 2017 | Canon Speedlite 580EX II TTL Flash

1 Answer

FLICKERING BACK LIGHT


Sounds like you have an LCD tv with backlight problems. Check power board for domed capacitors and replace them. next check connections on the inverter boards. they are on the sides or just one side. Becareful there is high voltage output from these boards. If the cable from inverter board is not good to the screen you can get a strobing. the inverter boards may need replaced. or cales to screen may be bad. The panel also could be bad.

Mar 25, 2010 | Televison & Video

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