white dots on Mitsubishi wd-73735

tameipaea

Honorable
Jan 1, 2014
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0
10,510
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Started 3weeks ago with 1 blinking dot and progressed to a whole spread of white dots all over the screen I have the 73" so its very disrupting to watching anything.. Please help!!
 

psychoclown81

Distinguished
Jan 1, 2011
2
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18,520
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Hi, you have a very large rear projection TV, but like most newer RPTV's, it uses DLP (digital light processing) technology as opposed to CRT or LCD projection. While DLP offers good quality and has been the industry norm up until a year or 2 ago when RPTV's ceded their market share to newer bigger cheaper LCD's, it's not without flaws. Your TV has a DLP chip in it that basically has an array of tiny mirrors that coincide with each pixel on your screen, so it's a ~2 inch wide chip with 1920x1080 micro-mirrors on it. Each mirror is angled electronically to reflect different amounts of light to its respective pixel to take care of shading your screen. Oftentimes when these chips get too hot (from running for prolonged periods and usually with the heatsink/fan that keeps the chip cool packed full of dust from normal use) the little mirrors with melt and fuse in place, no longer mobile they will be stock on or off making dots appear on the screen. The only fix is to get a new DLP chip and install it in the tv as well as taking care to clean the dust out of the cooling system. I advise you find a friend who knows how to do this, or simply follow a tutorial online for the procedure. If you had an old 40" RPTV i would tell you to get a new LCD but the sheer size of your tv makes this repair worthwhile.


TL/DR: You need to get a new DLP chip: http://www.shopjimmy.com/samsung-mitsubishi-toshiba-4719-001997-dlp-chip.htm
tutorial: http://www.youtube.com/watch?v=JgiZdc4kZDw

NOTE!! those links are examples, verify the model number is compatible with your tv before buying!!

180 bucks is a lot better than getting a new big-screen though, good luck!
 

psychoclown81

Distinguished
Jan 1, 2011
2
0
18,520
1
Hi, you have a very large rear projection TV, but like most newer RPTV's, it uses DLP (digital light processing) technology as opposed to CRT or LCD projection. While DLP offers good quality and has been the industry norm up until a year or 2 ago when RPTV's ceded their market share to newer bigger cheaper LCD's, it's not without flaws. Your TV has a DLP chip in it that basically has an array of tiny mirrors that coincide with each pixel on your screen, so it's a ~2 inch wide chip with 1920x1080 micro-mirrors on it. Each mirror is angled electronically to reflect different amounts of light to its respective pixel to take care of shading your screen. Oftentimes when these chips get too hot (from running for prolonged periods and usually with the heatsink/fan that keeps the chip cool packed full of dust from normal use) the little mirrors with melt and fuse in place, no longer mobile they will be stock on or off making dots appear on the screen. The only fix is to get a new DLP chip and install it in the tv as well as taking care to clean the dust out of the cooling system. I advise you find a friend who knows how to do this, or simply follow a tutorial online for the procedure. If you had an old 40" RPTV i would tell you to get a new LCD but the sheer size of your tv makes this repair worthwhile.


TL/DR: You need to get a new DLP chip: http://www.shopjimmy.com/samsung-mitsubishi-toshiba-4719-001997-dlp-chip.htm
tutorial: http://www.youtube.com/watch?v=JgiZdc4kZDw

NOTE!! those links are examples, verify the model number is compatible with your tv before buying!!

180 bucks is a lot better than getting a new big-screen though, good luck!
 
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