My zenith plasma 42w46x tv. doesnt show pic. the sound is there but no pic. I opened it up and founf out the the board on the right side of the tv(looking at it from the back) has two fuses, one of them is blown out, and when i replace it, when the tv is turned onit make a slight buzzing noise and the the power is turned off. but if i dont put no fuse in the box it turns on with the screen black.

Exactly right, your main board is bad. A new replacement from LG.com or Encompassparts.com should get it running even better than new for you.

You have several bad capacitors in your TV. There are in the deflection side of the board. I think there are three here. And check the vertical section, as there are three bad caps. You will need an ESR meter to find and replace these capacitors. The older Zenith are known for shut down due to weak and bad caps. Hope this clues you into the fix. Thanks for asking and show a few hands of support!

cheaper to just buy a new tv mate,sounds like the pixels for that half of the screen are gone.

plasma tvs buzz a lot, depending on screen brightness. its probably normal but if you can hear loudly over your volume, may be a bad board or plasma panel. from behind tv, left side = y board, right side = z board, middle = power board ---- bad panel can buzz from anywhere... if you hear all parts buzzing, its probably normal plasma noise

have you tried to adjust your aspect in the customers menu?

Hi I am Vortash Although this is trademarked as a Zenith the manufacturer of this set is LG and the prefix P42W46X is one of their set product numbers and is actually one of their RU-42W46X 10/11/12 -series televisions . The problem you are describing may be either incorrect display setting or incorrect picture fomat letterbox .. 4.3 pan or 16.9 widescreen I am guessing you do not have the manual for this set and I have found one on this site http://www.safemanuals.com under the LG P46W46X prefix FREE it may help you to solve this.
Another problem it may be is a power supply fault , components under heat conditions cann change value and restrict power flow causing many different faults this is particuarly true of semiconductors prior to failiure ..Try adjusting the set according to the manual and if this does not cure the problem I am afraid you are going to have to get the set looked at by an engineer . Regards Vortash

Your info doesn't indicate if you have a good onscreen display or not. If you do the problem is highly likely to be on the IO board on the rear patch panel of the tv. Replace this board and it should take care of the problem.

If you don't have a good on screen display the two common problems are either on the power supply module or the digital control module. Samsung is known to have problems on both these modules and an electronics technician should be able to remove these modules to inspect for cracked solder joints, or out of tolerance electrolytic filters.

If these conditions do not exist on either board then the power supply board should be replaced first before replacing the digital control board. Search for a vendor that will offer you a full refund will a small restocking fee if the board does not take care of the problem.

Hello to all! Some of the time with LG type Y & Z sustain boards you must replace both the boards in order to completely the repair or but not always. Please feel free to message or call me if you need more help with your Zenith plasma TV. 1-503-432-9904 / [email protected] Ask for Dave! If you are reading this post and you need help with a plasma or LCD type TV give me a call!

The problem is probably a shorted Z Sustain board located on the right side of the TV when viewed from the rear. The board sells for about $220.00. The pop sound comes from the speakers because the audio circuit is not properly muted before power down.

zenith agreed today to replace mine.