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Re: lot of color dots with bars
The TV may have become over-volted from the factory and the voltage settings have to be reduced for the dots to go away. If you have speakers by the TV it will do the same thing. You may also have what we call "burn-in" they are ghost-images that appear as bars on your screen Try Adjust the CONTRAST setting at or below 50% Most home theater professionals advise that you wash out your screen
with your television's anti-burn in calibration after the first 100
hours.You will have to check your owners manual.
My first solution is: Make sure you leave TV unplugged for 4 hours or overnight. You may have to do a couple of resets.
If you get a wide vertical strip it is very rare; it means the
horizontal deflection system is weak - but strong enough to produce the
I think the full, hard reset will solve your problem. In the worst
case, you may have to go into the service mode and readjust some of the
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If the 5V are 3.3V then either 1) You are not measuring it right or 2) The problem is at the power board, not the SSB; swollen caps on the power should be seen with ***** eye if that's the case or 3) The problem is on the SSB board where the 5V are used for bunch of things, including step-down conversion to 3.3V used by bunch of the main processing ICs and likely a step-up conversion needed by the video decoder. Any one of those could be overloading and causing the drop.
But everyone with pro skills with a 2 channel scope should already know all that, wouldn't they?
Hi,Yes your problem sounds like the DMD board.This is how it works: http://electronics.howstuffworks.com/dlp1.htm Basically the light of the lamp goes through a tunnel that carries a color wheel(rotating disc with a gamma of colors that creates the colors on your tv)then the light of the lamp goes through the DMD board which is a chip composed of around 2 million pixels that creates the images and colors.When it starts to fail it will create black bars,pixelation,color distortion or white dots on screens. Here's a video that will help you find where the DMd chip is located : http://www.youtube.com/watch?v=0jr_9A5Xd2Q Have a blessed one!
Hi,Yes your problem sounds like the DMD board.This is how it works: http://electronics.howstuffworks.com/dlp1.htm Basically the light of the lamp goes through a tunnel that carries a color wheel(rotating disc with a gamma of colors that creates the colors on your tv)then the light of the lamp goes through the DMD board which is a chip composed of around 2 million pixels that creates the images and colors.When it starts to fail it will create black bars,pixelation,color distortion or white dots on screen. Here's a video that will help you find where the DMd chip is located : http://www.youtube.com/watch?v=0jr_9A5Xd2Q Have a blessed one!
Hi my name is Eric,
I can help you with your issue ,
This philips TV could have a number off issues, fluid leaking from a CRT,
or the SSB or SSM boards are bad.
I tech will charge you over $350 to replace a board.
There are color adjusters in the back inside the TV , red blue green screen controls, it wouldn't solve your issue , but lowering on may make it watchable for now
If I have helped you with your issue please click accept.
If you have more questions you can still respond
I will reply asap
That is an ATC 222 Chassis and I would highly suspect the problem is in the Ssb rather than a lamp problem. In fact I think you could rule out the lamp all together... The Ssb (small signal board) is p/n# 258761 and takes care of all the color signal decoding. It has also a higher than normal failure rate.
Measure the connector from the logic board to the power supply the second pin from the left it will say Vs_ On if the set has 3.1 volts the problem is the SSB or the logic board. On the logic board there should be a solid led and a flashing led that shown that data id flowing and the problem is the SSB. The SSB is easy to replace just remember what you tokk loose and from where. You probely will save money that way. If the set is in warranty or just out of warranty contact Philips 1-888-744-5477 and see what they can do first.
The set has sound and no picture.If you the SSB could be the issue but the tiny red dots on a black screen will need the panle replaced also. There is a way troble shooting can be done to determine if you will need the SSB or the SSB and the panel.