Question about ViewSonic N1800TV 18 in. LCD Television

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How do I replace the backlight in a ViewSonic N1800TV?

If I look at the monitor from a certain angle, I can see that the menu still pops up. So I think the screen is fine. The screen is just VERY dark. Is changing the backlight something I can do on my own without spending a fortune on taking it to the dealer?

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Hi Jake.
You most likely have a bad backlight inverter, there is a small chance it could be a power supply issue but I doubt it.
Replacing the inverter should be straight forward and easy but working with high voltage electronics can be very dangerous, I must tell you that it should be repaired be a trained professional but if you decide to do it yourself I will walk you through it.
You can buy the inverter at When the part comes in get back with me and we can proceed in a chat from there.
In the meantime please rate me a FixYa.

Posted on Feb 24, 2009

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Posted on Jan 02, 2017

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Universal remote code for viewsonic n1800tv

0281,0289,0284. Try these codes. If you wish to get more details; check the sites linked here. It has set-up code list & set-up procedure to many popular brand remote controls. Common set-up codes to check with TVs and other devices are given, in the order of the "device's brand name" in alphabetical order. Pull up older posts. Surf the site with patience. Surf the sites by type in the brand name to your set, in its search box.
Type in the brand name of your device, in the search box [at the top right] of the display window, and press enter to get all related posts. It will make surf easy.

Feb 16, 2015 | ViewSonic N1800TV 18 in. LCD Television

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Videcon lcd tv picture not working sound ok mobile no 9011638898


Problem is in either power supply or the Y-Sustain board.

The Y-Sustain is a relatively large board out of which go connections to the side of the display; it's therefore closer to either the left or the right side of the display, has at least one rather large heat sink on it and fat power cables connecting it to the main power supply.

Often there are fuses on that board - one or more. Check those.

if they are blown you can try to replace them, but expect them to blow again - usually the whole board needs to be replaced.

Hoping that this will help out in solving the problem....

Aug 05, 2011 | ViewSonic N1800TV 18 in. LCD Television

1 Answer

N2700w how to replaced backlight or were can i find the replacement backlight part ??

You are unlikely to get help from Viewsonic, from my experience and from the 1000's of complaining former customers. Best source is finding the same model with a working backlight and some other problem, including a broken screen, as long as the backlight stays lite! Find out if it is the light or the inverter or a power supply issue first. Then out of 2 bad sets, make 1 working one.

Apr 02, 2010 | ViewSonic N2700W 27 in. HD-Ready LCD...

1 Answer

I have a problem with a gift from my sister, she gave me a viewsonic n2750w that she gave up on once it started to turn on and shut off on its own, i took it to my place, turned it on, the screen turns on...

Ur LCD inverter backlight board is dead.Replaced this LCD inverter backlight board will solved this problems.Tries Websites, to buy a refurbish LCD inverter backlight board for the replacement.The board is a long in shape.

Mar 22, 2010 | ViewSonic N2750w 27 in. HD-Ready LCD...

1 Answer

Audio but no pic. believe it the backlight. very handy is this a part avail for the DIY er

If you hold a flash light to the screen ,on an angle you should be able to see the picture in the background if its the backlight. Try lookin on ebay for the part or a site called

Nov 11, 2009 | ViewSonic N2750w 27 in. HD-Ready LCD...

1 Answer

TV went out over time. Sound immediately, but no picture. Loud POP noise when i changed channel. After a while it would "warm up" and would work fine. now doesnt show picture at all. In monitor mode...

Check the power supply first for bac capacitors (learn more here about bad capacitors:
I had replaced capacitors in my, hopefully it did not cause damages to other circuits such as backlight inverter board.

Nov 02, 2009 | ViewSonic N2750w 27 in. HD-Ready LCD...

1 Answer

My viewsonic vx2835wm has developed vertical pixilated lines

First thing you need to do is figure out where the problem is originating from. The monitor or computer?

When the lines appear, try the following:

1. Press the [1] on the monitor to bring up the menu. Do the lines appear on top of the menu?

2. Change the input. Do the lines appear on a different input?

If you answered "yes" to any of the question above, then your unit will need to be serviced.

If you answered "no" then test the monito on a different PC and verify if the problem follows the monitor. Also, try using a different video cable to rule out a bad cable.

Do the lines only appear when you are playing a game? Does it only appear on certain games? What resolution and refresh rate do you run the monitor at?

Jun 22, 2009 | ViewSonic VX2835WM LCD TV

1 Answer

I have sound and backlight, but no display.

the t-con board need replacement( it is found on the top middle section of the lcd panel)

Apr 27, 2009 | ViewSonic N2635w 26 in. LCD Television

1 Answer

Flickering lines down the screen

Take your power suply into a shop and ask them to check the output voltage for AC in the B+ . Theres most likly a bad capacitor in the power supply. if its a small transformer type Buy a new one. good luck

Jul 30, 2006 | ViewSonic N1800TV 18 in. LCD Television

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