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What causes my tv to switche off and on continuously

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Have an RCA 20F511T television that continuously loses power to the CRT. It is almost like a capacitor charges and discharges causing the screen to go from full picture to a single line, back to the...


it seems that the refresh rate of the tv is causing an issue try doin a hard reset
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Tv continually changes from video 1 to video 2 to video 3 etc... sometimes get black screen as well + menu items. Based on a suggestion, I removed the batteries from the remote but that does not help. This...


It sounds like a switch problem inside the TV if you have already tried removing the remote batts. Try replacing the switches behind the push buttons on the front of the TV. Also, if glass cleaner or some other foreign substance has run down the front of the screen and into the set, this can cause switches to short out and cause this problem. The part number for the switches is 23145227. Thanks for using fixya.

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LG LCD TV model 42LH70YR switches on and off continuously


eduramagli@gmail.comHELP PLEASEEE!! I`VE THE SAME PROBLEM! MY 42LH70YR SI CONTINUOUSLY TURNING ON / OFF !!
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Pump continuing to run -Asko D3100


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2 Answers

No picture


Hello shun09,
This problem denotes a possible shutdown circuit activation caused by excessive current flow from the IHVT. This might be caused by a shorted horizontal output transistor, or a shorted and or open transformer (Applies to CRT type TV). This also can denote a switching power supply shutdown circuit problem (Applies to LCD or Plasma TV). Both of these issues should be checked by a qualified TV technician.
Thank you,
I hope this helps, Shuttle83 

Jul 08, 2008 | Televison & Video

2 Answers

Auto off


possible cause is one or more imperfect contacts on the main board

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