The display on this unit has a problem. The display is split into two halfs. The split occurs horizontally. Both halves display a complete series of vertical lines that completely cover the screen, however, they do not mirror one another. The colors of the lines change to track the program that is playing. The audio is fine. The unit recently snapped out of it for about about 5 minutes and then returned. I gave it a good slap on the back and the unit corrected itself for a while but has since returned to its problem state. Any suggestions would be greatly appreciated.
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If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size. https://youtu.be/wUpnETSm6_k
Posted on May 22, 2017
SOURCE: Screen Changes and Comupter freezes
It may be possible that the power supply, display and or logicbpard may be having issues. Apple recommends resetting the pram and nvram. If issue persists reset SMU. YOur machine is 6 months outside of the original warranty, but if you purchased the 3 year extension plan, you may want to take action on it.
http://search.info.apple.com/index.html?q=imac%20g5%20reset%20pram&lr=lang_en&search=Go&type=
http://search.info.apple.com/index.html?q=imac+g5+reset+smu&type=&search=Search&lr=lang_en&search=Go
Keep me posted.
Posted on Nov 11, 2007
SOURCE: Vertical portion pixelats then forms
Note
In some cases, there are minor defects in some parts of the screen. Points that do not light, points with
brightness different from that of the periphery, or points with color different from that of the periphery.
Some pixels will always be on or always off. Please note that this is not a malfunction. So what this says is that it's not the Plasma Cell problem, its more like a bad board inside. You will need more info like schematic and find out which area the bad part is in.
Posted on Jan 04, 2008
SOURCE: Thin black horizontal lines on JVC PD-42WV74 EDTV
horizontal line is an idication of a bad board known as a x driver board. Their may be a slight possiblitliy it can be a small ribbion cable that runs from the driver board to the plasma panel. Another possiblility it can be a bad panel... but from the symptoms you describe i would first have to look at that driver board. and the sympton that getting worse makes me lean toward a bad ribbion cable.. if that could be reseated....well that the first thing as a technician i would try. Carefull Television generate dangerous voltages.
Posted on Jan 04, 2008
SOURCE: solid vertical line on JVC 42WV74
umm trying using it more, i had the same exact problem and we started using it more and more it has recently gone away.Check the wires as well (plug them out and back in)
Posted on Feb 22, 2008
SOURCE: No picture, Horizontal line center of screen
you either have a bad solder joint at the yoke plug. Thats the large group of wires coming off the yoke on the picture tube neck, Resolder where that plugs enters the chassis the pins may have a crack in the solder, The other item to check is the solder around the horizontal output which is mounted on the heat sink near the flyback transformer. That Transistor could be open as well and if so it will need replacing. Try the solder first however as that seems most likely.
Posted on Mar 30, 2008
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