Question about ViewSonic N3752w 37 in. LCD TV

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Viewsonic n4752w sound works fine picture is black

Power light green and stays green and screen flashes slightly and then goes dark.while the sound is fine.

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6ya6ya
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Posted on Jan 02, 2017

  • 121 Answers

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

  • 736 Answers

SOURCE: I have 2 ViewSonic N2750w and and they both have black screens

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

  • 9 Answers

SOURCE: my ViewSonic N3252 display is just a black screen

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

  • 1684 Answers

SOURCE: Hi, Viewsonic Tv displays blank screen when

Hello,

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.

I hope this helps, if so please rate our solution.

CCL_Tech
Corporate Computer
www.ccl-la.com

Posted on Mar 13, 2010

  • 1 Answer

SOURCE: Viewsonic N3250W I replaced the power supply board

I had the same issue and the inverter board fixed it, you can find it at shopjimmy.com.

Posted on May 10, 2010

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Dealing with a Planar PL1700-BK computer monitor. When power is supplied, the "no signal" box flashes, then the screen goes black. When hooked to laptop, screen shows desktop, then goes black.


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Jan 05, 2016 | Planar PL1700 17" Flat Panel LCD Monitor

1 Answer

Monitor Goes black, or flickers on and off


The high pitch sound is coming from the inverter. It is faulty and needs to be repaired or replaced. The inverter supplies high voltage to the CCFL lamp, this lamp gives the backlight to the LCD so you can see the LCD images.
Check out LCD parts for parts, service and DIY info. use this link :-
www.lcdparts.net

Aug 29, 2009 | ViewSonic OptiQuest Monitor

1 Answer

Screen goes blank within 1 second of being turned on


Bad capcitor in the psu would cause this to squel and even pop so have it looked at you be glad you did.

May 23, 2009 | ViewSonic VA720 17" LCD Flat Panel Monitor

1 Answer

I have a ViewSonic VE910b 19" That the display stays black


What your both experiencing is a slow degradation of the inside light bulbs. Just like what happens to regular fluorescent bulbs, they slowly flicker out.

Best to buy a new monitor.

Take apart your old one, you'll find burnt out bullbs on the upper and lower chassis deep inside.

Apr 22, 2009 | ViewSonic VA720 17" LCD Flat Panel Monitor

1 Answer

Screen Goes Black After About an Hour


Check the power board inside the TV, possible bad capacitors. I just had them replaced on mine.

Sep 21, 2008 | ViewSonic N3251w 32 in. LCD HDTV

1 Answer

Problem with monitor


Hi.
Are you able to see a slight image on it at dusk and maybe with the help of a flashlight. since your blue light stays on the video board, may be okay.
It sounds like you have bad capacitors on your powerboard or possibly a burned out transistor on the inverter.

Only way to really tell is to open it up.
If you unplug the screen to video board ribbon, you may notice a different effect in the screen lighting.
There is a chance one of your bulbs is creating a problem
Should the screen happen to light up all white, then your power board and inverter are okay and the problem may be in the video board.
If it looks pinkish or dark or flickers then the bulbs or a bulb may be the issue.
If it flashes on then goes off, it's in the power or inverter board.

ebaysbammbammfran

Sep 14, 2008 | ViewSonic VX2235wm LCD Monitor

1 Answer

Black screen - sound works


westinghouse_w32701_27_in_hdtv_lcd
power on no picture good sound and channel page up and down works
on background u can see dark picture

Aug 15, 2007 | Westinghouse W32701 27 in. LCD HDTV

4 Answers

TV Picture Goes Black


I had the same exact problem.
I removed the bulb and cleaned it. There is a small screen at the top of the bulb and it was covered with dust. Once it was cleaned I replaced the bulb and it solved the problem.
Thanks to those who posted the solutions

Jul 28, 2007 | Sony Grand WEGA KDF-60WF655 60" Rear...

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