I've just picked up a 2nd hand LG 42PX5D and overall pleased with it. It unfortunately has a light sparkle over blacks that doesn't stay stationary. It seems to follow the image across the screen whether it's in scart OR hdmi OR dvb-t.
Of course it seems a LOT of people have had a similar problem with a fix pointing towards adjust VS voltage, as LG have also been informing service engineers.
I've seen some people on Fixya adjusting the VS themselves. I'm hoping to find out exactly how to do this and hope it can be achieved by an average user.
The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.
SOURCE: Sparkles
Hi, Sparkles. if anyone knows how to fix this, would be greatful Regards,
I came across this LG 42PX5D 42 in. HDTV Plasma Television question on FixYa.com and thought you might be interested in reading it.
My set is around 16 months old & has recently started doing this. it is linked to a Sky HD box.
I have several inputs including P.C using-(RGB)SKY -(HDMI), Home Cinema -(AV4) and DVD -(gold plate scart (AV2).
The problem is active on all connections/inputs despite checking the connections. Occasionally (very rarely) it disappears for a programme or 2.
At first didn't know if it was my sky signal strength but obviously, cant be that, if its active on all inputs. going to try the idea on fix to see if it works.
jason1
SOURCE: Sparkles
Makes you wonder why nobody is taking on the problem, doesn't it?
Well , to the best of my knowledge, it is because nobody really can.
To understand why you have to understand what do they sparkles come from.
They are random electricity discharges coming from capacitors or other components that act like capacitors, but mostly capacitors.
When laymen hear about capacitors they usually associate the word with bulged electrolytic capacitors, which often cause problems in electronics of all kind.
Well this time it isn't about them.
It's about all other capacitors - or other components exposing similar qualities - which are installed on the board. Most of them are small filter capacitors put in parallel to the big ones or to other passive components such as diodes and resistors.
The excessive heat developed by the sustain boards damages those capacitors. It hardens the electrostatic material they are made of and small breaks in it start occurring at voltages that shouldn't otherwise be causing issues.
The trouble is, they can be everywhere. You can't just pinpoint which ones were caught at fault and causing the sparkles.
When it gets REALLY bad eventually the whole capacitor burns and either shorts or, more commonly, just breaks.
Believe it or not I've seen a board that exploded before my very eyes and , after the explosion, started working LIKE A CHARM!
Turned out a small filter capacitor had blown. It as not essential for the board's functionality and after being problematic for so long and causing image deffects it had eventually shorted completely and literally exploded.
Luckily, the short it had created was too short in time and apparently in a circuit that could take the load for a short while without getting damaged.
So after it blew everything worked just great!
it's a real story from my repair experience.
Hope this helps all consumers, DIY enthusiasts and competitors alike :-)
For more you are welcome to visit our site and read our tech repair blog at
http://www.coppelltvrepair.com
and
http://blog.coppelltvrepair.com .
Good luck!
and Zeneth among others. and Zeneth among others.181 views
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