Question about Mitsubishi Televison & Video
I have three dots now...they are white and its like the pixals are blown what could this be on a rear hd projection tv that is less then 5 years old
The model number almost certainly is a wd one.
Set is a DLP set with a lamp and 98% chance the optical light engine is the cause. Some of these start with one or two out and gradually it can get worse with more and more appearing over time.
It is about the most expensive part in the set.
Sorry, but I have seen them since the first DLP sets came out.
Posted on Dec 05, 2012
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Posted on Jan 02, 2017
The color has gone crazy on you because your convergence IC's have gone bad.
These IC's operate at a very high temp, and usually only last 4-5 years.
If you remove the back of the set, you will want to look for the BIGGEST heatsink in there, on that heatsink, you will see 2 lage IC's , probably STK392-110, or STK392-120's or something close...regardless - you can go on ebay to order the new ones, but MAKE SURE they are Genuine SANYO IC's and not counterfiet cheapies. the cheap ones may only last 2 months..
You will also need some "Heat transfer paste" - you can pick this up at radio shack.
Once you remove the old IC's, test all the large resistors near them.. pull one side of the resistor out of the board so you can check it out of circuit. they will usually have the value in Ohms, printed directly on the resistor, but you may have to use the resistor color code to find out what value they are....However, usually if there is any damage, the resistor will look like it has been HOT or fried. replace the IC's and any bad resistors, and you should be good to go.
If after replacing the IC's and any defective resistors, the convergence is still bad, make sure to use a multimeter to check ALL fuses on the boards, --- sometimes when the IC's go, they will take out a fuse to the convergence power supply. If you find any bad fuses, replace them accordingly!
Hope that helps!
Posted on Dec 21, 2008
Dot problem in Sony DLP TV caused by bad light engine (optical block)
Its costly part and needs qualified TV tech to fix it.
Posted on Jul 25, 2009
It seems you might have an issue with the dmd board. Go to the menu, and if the dots still show on the menu, the issue definitely is with the dmd board but if they don't come up on the menu, the issue will be with the video board.
Posted on Aug 20, 2009
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