Question about JVC AV-27530 27" TV

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JVC AV-27530 Sudden changes in brightness

Hi there, When I view an image that suddenly cuts from dark to very bright, the TV seems to "limit" the brightness after a split second and the once bright image becomes noticably less so. This can be fixed by drastically lowering the "picture" setting on the TV, but that muddies the rest of the images. Does this TV have some kind of superwhite limiter or something? Its very noticeable and quite annoying. Any help?

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  • Anonymous Mar 16, 2014

    I have jvc tv av-21DTG2,everytime i turn it on the screen is too bright not like before i bought it from abroad,i tried to adjust the brightness and it will adjust but when i turn it on again,the same problem,what seems to be the problem?can somebody help me?

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This sudden changes in brightness are caused by the change in voltage inside the tv,not in the outlet in the wall but inside the set,The changes are an indication something is going wrong and it needs to be corrected,the set does have a brightness limiter but it only works when the set wants to get brighter than normal,You need the assitance of a servicer to correct this problem.

Posted on Oct 04, 2006

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Posted on Jan 02, 2017

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**WORKS**

In my case, the adjustment was available from outside the TV. Sortof. On the rear of the TVabout 2 inches to the right of the coax in, there are two vertical slits on a little protrusion. Inside the slits are the two adjustment screws. The lower screw adjusts brightness, the upper screw adjusts focus.

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To answer your question nothing is going to drop inside the set,I also need to tell you that a cleaning of the inside is not going to correct the problem,you should get at least the opinion of a servicer to determine if the set is repairable or not,an experianced techician should have a very good idea as soon as he sees the picture,if he sees the need to remove the back cover that will be a good time for you to see if it needs cleaning,Be safe and get an estimate.

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