Question about ViewSonic VA721 17" LCD Monitor

1 Answer

The power light keeps cycling on and off. and the screen flickers on for a split second.

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 11,361 Answers

Look for bad caps, shorted transistors, etc. See my pictures here:
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VA721/

Please read my guide and learn about bad caps and look at the pictures of failed VIEWSONIC and all other brands of monitors.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://en.wikipedia.org/wiki/Capacitor_plague
Learn about bad caps: Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Posted on Nov 10, 2010

Ad

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

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Toshiba 50hp66 Plasma repeats power sequence without turning on


A case of which came first the chicken or the egg, Power supply board may be the issue or the sustain board--have you looked for the usual bad caps on the power board?

Dec 03, 2012 | Toshiba 50HP66 50 in. Plasma Television

1 Answer

Can missing motor mount cause oil pressure problems? My oil pressure light keeps flickering and I just got the oil changed, the spark plugs and wires changed and pcv changed. I found the engine mount...


If your engine is free to move around, your engine may be losing rotational force to engine twist. Technically, when there is a sudden loss of rotational power in the engine rotating assembly, this could cause the oil pump to stop rotating for a split second. however, there are many more reasons that you need to get the mont replaced anyway.

Dec 01, 2009 | 1995 Ford Escort

1 Answer

Pinstripe cinema display flickers on momentarily then goes black. Image comes back for a split second while when power light glows steadily then goes away while power light flickers. this is a 22"...


when the screen is black and the power light is steadly lit, shine a flash light at the screen. if you can see something, the inverter board is bad and the back light cannot turn on. if the power light flickers, reseat the power plug and put your ear to the back of the monitor where the power plug is. if you hear a buzzing or any high pitched noises; the power supply is bad. use the macufactures warranty for repairs.

Nov 18, 2009 | Computers & Internet

1 Answer

LG1719S blank screen but with a flicker


Its a problem with the lcd and the cost to replace the screen is more then the cost of getting a new monitor.

Jun 16, 2009 | LG Flatron L1951S 19" LCD Flat Panel...

1 Answer

BLANK SCREEN???


This new system I'm using has done something similar on a few occasions. I only had to disconnect/reconnect the plug from the back of my monitor and did the same with the Vdo card plug and everything was fine. That hasn't happened again since I put a different power cord on it.

Oct 06, 2008 | Dell Dimension™ B110 PC Desktop

1 Answer

Ds screen just flickers


Check all the ribbon cables and make sure they are all the way in. The flickering screen tells you it's probably one of the cables not on that screen. These cables go in a lot further than you might think.

Mar 19, 2008 | Nintendo DS Lite Console

2 Answers

MONITER LIGHT IS GREEN BUT ONLY SHOWS A NORMAL SCREEN FOR 1/2 SECOND THEN TURNS BLACK


HI. I had the same problem with mine. It would flash the screen on for a split second and then turn black, the whole time the power light remained green. Upon opening up the case, I pulled the combo power supply board/inverter board out for inspection. I noticed one of the capacitors had a bulge on top indicating it was bad. It was the the 680uf 25v capacitor. I desoldered it, and soldered in the new one. After hooking everything back up, bingo!! Monitor now works perfectly. I couldn't find an exact match to the capacitance locally, but I had a 1000uf 35v cap in my utility box. It worked fine as a replacement. You can usually go within 30 percent of tolerance and be alright. Just don't go under on capacitance or voltage. I hope this helps.

Nov 25, 2007 | LG Flatron L1710M 17" LCD Monitor

Not finding what you are looking for?
ViewSonic VA721 17" LCD Monitor Logo

42 people viewed this question

Ask a Question

Usually answered in minutes!

Top ViewSonic Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18424 Answers

Cindy Wells

Level 3 Expert

5481 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...