Question about Zenith P42W46X 42 in. Plasma EDTV
Tv only 3 1/2 year old, we had cable hooked up then we turned it on and all we get are vertical colored lines. Good Sound
SOURCE: zenith 42" plasma p42w46x
I have the three zenith plasmas, I've fixed the two that were flickering. The one with the verticle lines, I sawpped the Z-SUS and the Y-SUS from the good TV to the bad and still had the white lines. I looked at the two boards hooked together with 3 aluminum covered ribbon cables that are in the lower center of the TV with all the video inputs, on the far left there is a right angle connector that has about 20 pins, the white cable comes out and goes under to a circuit board this looks like this cable supplies the video signal to the screen. I disconnected the cable and the screen went black, all the voltages going into the video board are normal, so there must be something fried on one of the two boards, there are a LOT of electrolytic caps on those boards. I will post when I figure out whats cooked, you may have the same problem too.
Posted on Dec 26, 2007
Press menu button on the TV if the on screen display is also distorted or no pic the TV is definetely defective. You can try unpluuging from wall for about 15 minutes and see if reset helps if not problem is either main p.c.b , LCD panel , LVDS cable or Power supply board. and would require service. most likely problem would be bad connection at or defective LVDS cable that connects main p.c.b to Panel (cheapest fix) or defective main p.c.b. If it is the panel it would probably not be worth repairing and you may want to sell as is on ebay.
Posted on Jan 13, 2008
SOURCE: Zenith P42W46X - no picture
if the lines covered the entiire screen, fist I would check to see if the TV's menu can be seen. If not then check the buffer boards. Next I would check the logic board
Posted on Jan 10, 2009
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
Posted on May 27, 2009
There are 4 or 5 ribbon cables on the bottom or on one side, they control part of the plasma screen. Check the ribbon cable near the black lines. Unplug the ribbon cable and look for black chips on the underside of it, I think they say 100 on them, you need to resolder both ends on each chip. Should fix the black line issue.
Posted on Nov 16, 2009
Testimonial: "thank you for your respond.you are absolutely right and i have already done that it is fixed now, thank you for caring and your time,,,:)"
Mine looks like too, but the line running across isn't on my set, picture looks like this, and the sound works fine. I took the tuner board all the way out and turned the set on and it did the same thing, then I unplugged the top wire on the board next to the tuner board and the screen went black. plugged it back in and the screen came back with the scrambled picture. Anyone know why? Bad mainboard maybe? the left of the tuner board?
Posted on Jun 14, 2010
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