Question about ViewSonic N3752w 37 in. LCD TV
Power light green and stays green and screen flashes slightly and then goes dark.while the sound is fine.
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Posted on Jan 02, 2017
SOURCE: Viewsonic N3760W won't power on
Try unplugging the set from the AC power source wait for several seconds and then plug it back in. Cross your fingures and hope that the reset works!
Posted on Feb 25, 2009
i have repaired several n3750w viewsonics .. that may be similar to the 2750 .. in my case all the failures were caused by the same faulty part in the power supply .. the power supply has a 48 volt supply at about 7 amps .. the design uses a syncronous rectifier .. these are normally not used in supplies with that high a voltage out .. syncronous rectifiers make sense when the output voltage is low .. like 3 or 5 volts .. the parts are designed for that range .. but in this supply an IC is over stressed and fails frequently .. you might hear a chirping sound as the supply cycles thru an overload condition .. i modified the power supply to eliminate the syncronous rectifier and replaced it with a single shottky diode .. dissapation goes up slightly but reliability goes up a lot .. i have written an article on this. if anyone needs it i will try to find it . ..
Posted on Jul 25, 2009
As with most LCD screens the two most problems that cause black screen are bad a solderjoint on the inverter board or bulging capcitors, the next problem would be most likely the power mosfets witch break down after time.
Posted on Jul 28, 2009
This problem is an indication that your power supply board is failing. We have an article posted on our web site at: http://www.ccl-la.com/blog/index.php/capacitors/ The article explains what the problem is and what will need to be replaced to perform the repair. If you don't want to do the repair yourself, we do offer a repair service. You can request service here: http://www.ccl-la.com/blog/index.php/service-request-form/ If you have any questions just let us know, we will be glad to help.
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Posted on Mar 13, 2010
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