Question about ViewSonic G800 20" CRT Monitor

1 Answer

Horizontal widh shrinked

After changed the resolution from 800*600 to 1024*768 Horizontal scanning failed. All picture concetrated in the thin (about 8mm) column in the center of the screen. osd controls working only horizontal width not.
Changed back the resolution bat the same problem.

Help me pls.

Posted by on

  • Deak Imre Feb 23, 2008

    Cheked and changed the Q303 (2sc4290) strartup ok bat after 5 seconds started to shrink again ,after power down and wait 5 min started up ok dat the same problem after 5 sec


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 981 Answers

Huh, it sounds like the monitor's horizontal deflection amp (a big transistor) failed. It is not so if you can feed it a good signal and get a wider picture.
You would replace that thing with a transistor with a similar drive profile (i.e. not a FET), if you practice the right safety; better to use a service tech to do it unless you were trained in it. Alternately, you can try freezing your monitor (wrap it to keep out condensation! I only mention this because it's freezing out, where I am....) and see if this helps the transistor recover; it's not that sage or safe though, because of the condensation/electricity hazard and unlikely event that you will ground a work bench surface to do this test!

Be safe and consider using lower-power-consumption flat screens in warm weather.

Posted on Feb 23, 2008

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Input not supported error

The native resolution for the x193w monitor is 1440x900. The monitor will only allow certain resolutions. You may need to create a custom resolution using the nvidia control panel.
advanced options display change resolution customize create custom resolution horizontal pixels : 1440 vertical lines 900 refresh I belive is either 75 or 60. Whichever looks better scan type: progressive

Feb 22, 2011 | Acer X193W LCD Monitor

1 Answer

Words are not sharp!! Words appear thin.

Do you have your PC video resolution set to the native resolution of this monitor for best pictures?
It should be 1680 x 1050 @60Hz.
Does it do the same with another PC?
Please post back what you find.

Failed TV, Monitors, capacitors, and lamps pictures:

Nov 02, 2010 | Samsung SyncMaster 204BW LCD Monitor

1 Answer

Screen Output is bigger than screen size

You can shrink the picture by pushing the menu button on the front of the monitor and scrolling down to the "vertical" and "horizontal" settings and pushing the minus key a number of times until you see the edge of the screen come into view.

Dont forget to save your setting as you exit or the picture will be too big the next time you start your monitor and/or computer.

Good luck and be careful.

Mar 08, 2010 | Acer X193W LCD Monitor

1 Answer

Monitor emachine

If the width is shrinking, check also if the edges are now distorted too.
If so, there is a 'bipolar' capacitor in the high voltage section that is failing.
To find and verify this, you will need a meter that can measure capacitance, and perferably, DF or losses of capacitors as well.

If you ignore this, the horizontal will continue to shrink until the deflection stops completely and can cause other, more costly parts to fail although these may also be weakened and failing.

I'm afraid this is not a DIY problem.

Aug 27, 2008 | Computers & Internet

3 Answers

Horizontal display

Check with the manufacturer information that you have the refresh rates and maximum resolution set correctly. If in doubt, go to your display properties and try something basic to test if this is the problem. A basic setting may be as low as 1024x768 at 60 Hz.

(You can access your display settings by right-click the desktop anywhere and choose properties, then settings).

Leave the monitor at that setting for a while to see if the monitor changes the picture.

If the picture changes, it may be component failure in the monitor. If not, the problem is then related to the settings from your VGA card are too high or dense causing the monitor to fail after a time. Try something higher like 1280x1024 @ 60Hz and keep going till the picture fails. Compare the best functioning resolution with the manufacturer claims about the product in the product documentation.

Be sure there are no cable bunches and the power cables are not wrapped up with the VGA cable under the desk or there are not too many cables lying about, although unlikely, this has been known to distort the picture.

Let us know if this helps.



Mar 30, 2008 | LG Studioworks 775N 17" CRT Monitor

1 Answer

A very thin vertical brun line in the middle

If it's a straight vertical or horizontal line always in the same place it's a panel issue which the average user even with repairing skills will not be able to reliably repair ,Sorry.

Feb 25, 2008 | Dell UltraSharp 1905FP LCD Monitor

2 Answers

Width problem

Sometimes you will need to reinforce the whole circuit with new soldering metal as well. Mass produced circuitry sometimes uses very little of the stuff or uses soldering metal of poor quality.

Apr 09, 2007 | LG Studioworks 563N 15" CRT Monitor

3 Answers

A thin horizontal line across the screen

I know I have seen thin lines in the past on older CRT monitors, these are usually wires which support the aperture grill. LCD is just a panel so this must be something different. What color is the line? It is probably an error in the scanning process.

Aug 01, 2006 | Gateway FPD1975 19" LCD Monitor

2 Answers

Horizontal scanning does not work

You have high voltage. Horizontal sweep is not working. Mostly we see shorted sweep transistor. Mike

Jul 03, 2006 | iiyama Vision Master Pro 510 22" CRT...

Not finding what you are looking for?
ViewSonic G800 20" CRT Monitor Logo

50 people viewed this question

Ask a Question

Usually answered in minutes!

Top ViewSonic Computers & Internet Experts

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18333 Answers

Cindy Wells

Level 3 Expert

4807 Answers

Are you a ViewSonic Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides