Question about ViewSonic VA902b 19" Monitor

3 Answers

Picture problem on my viewsonic the power is on and signal is plugged in but the picture will flash really quick and then picture screen turns immediatly blank

Posted by on

  • 3 more comments 
  • Anonymous Feb 10, 2008

    I am having the same problem. The picture will flash quickly and go black.

  • McKaiver Mar 28, 2008

    I have the same problem, as bombin_ramin's dose his description of the problem is better then mine was. Just the same can anyone help Thanks McK

    I have only done a visual inspection of the monitor for bad soldier joint or a bad / blown capacitor, I don't know too much in electronics except a few of the basics.

  • gieni May 08, 2008

    same problem

  • strawboss59 Feb 19, 2009

    Great solution! My monitor is working again!
    I not only replaced the 1000 mf 35v cap, but also the 3- 220 mf 25v caps #802 etc.... that line up to the right of the 1000 mf cap when the heat sink is at the top, as the tops of those were bulging. I used 50v caps as they were all I had, all my replacement caps were 105 degC

    I've also cut extra ventilation slots in the back of the case with mesh
    as heat seems to be the major problem

  • Anonymous Apr 12, 2009

    Viewsonic monitor va 902b monitor turns on and picture stays on for a second then goes away.

×

Ad

3 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have the same problem... I replaced all the caps on the primary and secondary side of the powersupply. I found 3 Caps bulging on the secondary by the high voltage transformers. I have 15vDC on the 1000uF cap but I am missing the pulse to the transformers to switch them to make high voltage. Any suggestions? I replace the two 8 pin dip ic's (FET's) that drive the transformers and still no pulse.

Posted on Oct 26, 2009

Ad

Dear friends,

I just fixed my Viewsonic VA902b, here is how.

1/. Remove the LCD housing

2/. Remove the Main Power supply PCB (label the 4 connectors for the 4 lamps before you unplug them)

3/. Locate the 1000uf-25v Cap (i think c806) check the top of the cap, if the top is bubble up then replace it. I replaced my with 1000uf-35V 105 C, use the cap with long leads, solder it to the PCB and lay the cap down away from the heat sink (there should be plenty of room)

4/ check all solder joins, if it look like cold joins simply re-solder it

5/ when you are done, you can apply power to the board and check for the voltage at the cap, it should read about 14.7VDC

6/. Re-install every thing and it should be good to use again

Please pardon my english. Good luck to all

Posted on Jun 26, 2008

Ad

Having the same problem, storm the night before? Mabye lighting

Posted on Jun 18, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Viewsonic N2060w no picture but sound My Viewsonic was working fine yesterday, now when i Turn on there is power going to the TV but no picture on the screen?


LCD backlight has gone out , you can verify this by holding a flash light up to the scene to see image , www.partstore.com or www.shopjimy.com where you can buy the part and put it in yourself would save you money

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

Oct 04, 2011 | ViewSonic N2060w 20 in. LCD Television

1 Answer

I bought this N2635W it wasnt turning on. (So I thought it was the power supply) I bought a new power supply, and still didnt turn on.( So I thought it is the main control board) I bought a usded...


The tv Tuner signal board is the cause and the problems.That the board,where the incomming broadcasting signal cable wire plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish tv Tuner signal board for the replacement.

Mar 15, 2011 | ViewSonic N2635w 26 in. LCD Television

1 Answer

Monitor is black,power line flashing.


Flashing power light often means the monitor isn't getting a signal. When you turn the monitor off and back on, do you see the viewsonic logo for a few seconds? Try plugging it into a different computer to see if it comes on.

If plugging it into another computer doesn't work, it may be a bad power circuit in the monitor. A common problem with monitors is the capacitors going bad. If you're handy with a soldering iron, you can try replacing them yourself. Look here for pictures and instructions: Fix an LCD Monitor

Aug 15, 2010 | ViewSonic VX924 19" LCD Monitor

2 Answers

Viewsonic N3250W I replaced the power supply board but when I turn on, the screen flashes real quick and there is no picture.


it was not the power supply its the invertor board that controls the back lighting/switch on screen flashes lights go off/shine torch into screen ull see picture/get new invertor board 7 or 8 little plugs go into it

part or repairs in uk ohm supplies

Jan 08, 2010 | ViewSonic N3250W Television

1 Answer

My monitor green light keeps flashing. I cannot get a stead display.


Flashing power light often means the monitor isn't getting a signal. When you turn the monitor off and back on, do you see the viewsonic logo for a few seconds? Try plugging it into a different computer to see if it comes on.

If plugging it into another computer doesn't work, it may be a bad power circuit in the monitor. A common problem with monitors is the capacitors going bad. If you're handy with a soldering iron, you can try replacing them yourself. Look here for pictures and instructions: Fix an LCD Monitor

Dec 23, 2009 | ViewSonic VX924 19" LCD Monitor

1 Answer

Monitor screen begins as computer is booting up and then screen goes black. Message says there is no signal.


If the power light dims or changes color after the no signal message comes up, that means the monitor went to sleep.
While the monitor is plugged in and on and the computer is also on, Try unplugging the VGA cable from the monitor. wait 30 seconds and then plug it back in o see if the power button light comes back to normal color and the screen flashes on.
If not, then the monitor is not getting a signal from the computer.
If using a desktop computer,Try a different cord or try the monitor on another computer.
If using a laptop, you need to activate the laptop to use an external monitor. That can be done through the display settings, OR, most laptops have a shortcut key feature which usually involves pushing the Fn key and one of the F keys at the same time. The F key may say CRT/lcd or have a picture of a monitor and a screen.
If the power light does light back up and still no picture, There may be an internal issue on the monitor

Nov 17, 2009 | ViewSonic VG2230WM LCD Monitor

1 Answer

When i try to turn the viewsonic on the green power button comes on for approx. 7 seconds then flashes off without any picture appearing on the screen. The red power button does not come back on until i...


This generally means the monitor can not detect a video signal. Have you tried a different monitor? Or try the monitor on a different computer.
If those are not options, check you video card and try to boot Windows in Safe Mode (VGA resolution).

Jules

Jul 24, 2009 | Computers & Internet

1 Answer

Viewsonic Projector PJ557D "Screen Flip"


Check the power settings o nthe laptop, go to control panel, power options. see if its set to turn off the screen if theres no activity. I doubt this is your problem but worth a try. Going back to the viewsonic picture means its not getting a signal. So either the cable may be faulty which is less likely, or it is a software problem. Does the screen flicker on the laptop when doing the same thing (if the projector is not connected)?

Jun 12, 2009 | ViewSonic Lenovo Viewsonic PJ557D Portable...

10 Answers

Viewsonic Monitor problem, blinking LED light, no picture.


you guys......you don't have a software (driver, refresh rate, etc.) problem. When you first power up the monitor, do you get any display at all (ex, "analog input" or "No input signal")? Of course not - that's because you have a hardware problem with the monitor. Go here and watch the youtube video on how to take apart your monitor and find and replace the "domed" capacitors that have blown:

http://www.tomshardware.com/forum/247964-33-viewsonic-vx922-monitor-black-screen-green-power-light-flashes

Fortunately I only had 1 ($1.76 at Radio Shack). I replaced it in less than 30 minutes and my monitor showed "no input signal" upon powerup as expected because I wasn't connected to my pc which is full of all kinds of drivers and refresh settings, etc.

Aug 16, 2007 | ViewSonic VX922 19" Monitor Flat Panel

Not finding what you are looking for?
ViewSonic VA902b 19" Monitor Logo

982 people viewed this question

Ask a Question

Usually answered in minutes!

Top ViewSonic Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18425 Answers

Cindy Wells

Level 3 Expert

5589 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

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

Answer questions

Manuals & User Guides

Loading...