For several months now, our Hitachi plasma tv has little green dots over most of the screen. They flicker, almost like tv snow, and are more noticeable on a darker screen image. In some instances they are not noticeable and sometimes they affect how well you view a show. What in the world could be wrong? THanks in advance for any solutions.
I know I a few years late, but for the benefit of others I'll share my experience. I have a Hitachi 42EDT41 and it had lots of green snow-like static dots - mostly over black areas of the screen. Other forum posts suggested adjusting the VSCAN on the Y-Sustain board (upper left corner when viewed from the back w/back panel/cover off), but my Hitachi had not VSCAN knob to adjust. That's when I read this post which informed me that what I was looking for was the VR1 or VR2 knob on the Y-Sustain board. I slowly adjusted the VR1 (counter-clockwise) as suggested. The green dots diminished but still remained in one small area. I, then, rotated the VR1 knob back to where I marked it and lo-and-behold the green dots were gone. My thanks to pleasefixitDave for the post. I saved a lot of $ and it was super easy :)
I know I'm a few years late, but for the benefit of others I'll share my experience. I have a Hitachi 42EDT41 and it had lots of green snow-like static dots - mostly over black areas of the screen. Other forum posts suggested adjusting the VSCAN on the Y-Sustain board (upper left corner when viewed from the back w/back panel/cover off), but my Hitachi had not VSCAN knob to adjust. That's when I read this post which informed me that what I was looking for was the VR1 or VR2 knob on the Y-Sustain board. I slowly adjusted the VR1 (counter-clockwise) as suggested. The green dots diminished but still remained in one small area. I, then, rotated the VR1 knob back to where I marked it and lo-and-behold the green dots were gone. My thanks to pleasefixitDave for the post. I saved a lot of $ and it was super easy :)
Oops, double post :/
×
That is called diffusion. that can be adjusted out in most cases by adjusting the y sustain pcb but can also be the main pcb, the logic pcb and panel itself but not likely.
933 views
Usually answered in minutes!
I have the same on my Samsung 50" but only seems to affect the top half of the display .
×