Question about Zenith H36F46DT 36" TV

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The picture is dark

We have tried to brighten the picture - but it does not lighten up - some shows we can not watch if the back ground is dark.

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Re: the picture is dark

Hi This could be one of three possibilities, one the High Voltage Screen Adjustment is off, Two the Picture Tube is Weak, or Three there is a problem with the Video Drive Amp/Amps, these are things that should be checked or adjusted by a qualified technician, especially the High Voltage Screen Adjustment, hope this helps.

Posted on Apr 23, 2007

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Our tv has been getting darker and darker - we've tried to adjust brightness in menu and have it set to far right but its still too dark. Is there another adjustment to brighten the picture other than...

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with a flashlight at the back of the set often times there is an adjustment you can make WITHOUT having to open the set!!!

look for a little hole in the back of the plastic cabinet labeled SCREEN then with a flat screwdriver holding only the plastic handle, insert it into the hole and SLOWLY rotate until the screen brightens up until it is watchable.

This is compensating for age in the picture tube. you may get a few day or a few more years! of a much better picture.

If you start seeing some thin lines on the screen then back off you have gone too far. Do this adjustment with the brightness and contrast controls on the menu turned up all the way.

it is also safe to play with the focus adjustment right next to the screen if thing seem a little blurry. you will need two people one to watch from a distance for best picture.

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If you are comfortable working inside the set, I can suggest the following:

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2) adjust the top one slightly clockwise as you are facing ht back of the TV. This should cause the overall picture to brighten. Don't turn it too much as you will then see the "retrace" lines.

3) Adjust the lower one to focus the picture.

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1 Answer

Picture is dark

Your set may need to have a screen control adjustment. This adjustment is on the high voltage transformer and the back cover will have to be removed a access it. I'm assuming that your set has a picture tube in it- not a plasma or LCD display. If this is the case you can remove the back cover and adjust this control while observing the picture being shown. If you adjust it too high you'll get retrace lines (fine lines going accross the screen). If you're not comfortable doing this or inexperienced, you might want to get a technician to adjust it for you. There are dangerous voltages inside! Stargazer

Apr 15, 2007 | Zenith H36F46DT 36" TV

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