Hi, My Viewsonic vg2021wm says "No signal digital" There is white paste around couple of caps and couple of caps have tiny black dot above them. There is also one componet I didnt identify: MF71 10D-13 it looks like a NTC thermistor? and it has also white paste around it. What should I do? what is substitutive component for MF71 10D -13? Thanks in advance!

after making a cleaing, if you still found the white dots, i think it is problem with DMD chips. you have to buy a replacement,
if your machine is ViewSonic PJD6221, congratulations, this model machine is used 1076-6038B DMD chips, at present, it is the cheapest DMD chips.

Your TV is DLP projection TV. DLP is Digital Light Processing. Digitally processed light coming out of DMD (Digital Micro mirror Device) is projected on the TV screen. This DMD is made of thousands of tiny mirrors & the size is about 0.7 inch. These mirrors are fixed with tiny hinges for its movement. They reflect light as per processed signal. DLP is invented by Texas Instruments. When there are dots on the screen, that means the tiny mirrors representing the dots are stuck in its position. If the dots are few & the viewing is bearable, just leave as it is. If the dots are more than bearable then you will have replace the DMD chip which is quite costly.

Is it model VX2235? The VX series are known for bad caps problem, http://s807.photobucket.com/albums/yy352/budm/VIEWSONIC/Viewsonic%20VX2235W/

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

You wired it correctly. The timer is defective. Return it for another one.

The white stuff is adhesive to keep the parts in place during wave soldering of the PCB.
Do the caps have flat tops and no bugling seals at the bottom?
See the pictures here of the bad caps and the white adhesive:
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VG2021/

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

It may not be getting the signal from your PC, I would try it with another PC first to make sure it is not PC's Video card problem, otherwise it may have problem inside like unsteady DC voltages due to bad caps as shown in my pictures here: http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VX2235W/

http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Hi,
white dot is from a failure in the dlp chip. it controls 1000s of tiny mirrors which help make up your pix, when the mirrors get stuck a white dot appears. over time more will pop up. Probably in the $300-$500 range to have someone repair.

Hi,

You get white spots inside the samsung DLP tv due to bad Digital Micromiror Device , or bad DMD board .

What is actually the problem is the DMV chip connected to this board . Inside this chip are 3 million tiny mirrors ,and when they physically get stuck , they either show black or white instead of a color
This is well know problem with SAMSUNG DLP...

The DMD chip is failing.If not under warranty expect to pay a few hundred to several hundred to get it fixed

The mirrors on the DLP chip are slowly sticking either fully open (white) or fully closed (black). The part that contains the DLP chip is the Light Engine. It is the most expensive part of the TV.Only the Samsung TVs has this issue.

Replacing the DLP chip and the micro mirror would solve this issue...

Pleaserate this solution,
Rnj VINODKUMAR

I have the same thing too. My guess is that some of your MEGApixels (tiny squares that create your screen) Are fried.

It was actually one of the fuses for me.