I have a 60 inch TV and it started to have small pinhead white dots. what started to a few we now have a screen full. We have already replaced a lamp bulb.
I have replaced a bulb at one point we had no picture only sound worked great after now the white dots appeared.
Hello,Thank you for choosing Justanswer. Before I start, please answer the following questions.Does the no. of spot increase? Also, do you notice them with all the inputs(such as HDMI, component etc.)?How old is the set?Regards,Pramit
yes the spots increase and they are the same with all inputs. I do not know if this means anything but when the tv is turned off the dots are the screen until it cools down and goes all the way black
What you are experiencing is a failure of DMD(Digital Micromirror Device) actually.
I have seen this problem on Mitsubishi and many other brands of DLP TVs, as well. Most of the time the entire light engine is either replaced or worked on. Each spot (pixel) that you view in the picture is made by a single mirror moving back and forth on the DMD. In total, there are over a million of these tiny mirrors, and the white spots you see are those mirrors that have stuck in the "On" position. These mirrors get jammed and hence this problem.
I recommend contacting Mitsubishi Consumer Relations at(NNN) NNN-NNNN to ask (emphatically insist) that they cover the cost of the repair. They may very well supply the optical engine(part no.938P126040) at no charge or small charge, with you paying the labor; but, it doesn't hurt to keep trying for the labor cost, too. Sometimes they will offer you a rebate on new set. If your set is under extended warranty then you won't have to spend a penny. Else I would guesstimate this repair would cost you around $1200. I have seen major companies like Sony, Samsung, Mitsubishi considering it as premature failure of light engine if the TV is less than 4-5 years old.
They will have to come and check the set onsite first before they can offer a concession. Hence you will have to call them and place a request.
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Diploma in Electrical and Electronics from AVV University