Question about ViewSonic VA520 15" Flat Panel LCD Monitor

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Viewsonic - shows signs of overheating component

I've got a seven year old Viewsonic VA520, just in the last couple of weeks it has started to show signs of its age. After a few minutes on, white vertical dotted lines start to appear, which 'solidify' and multiply until the entire screen is pretty well obscured. Turning it off/on briefly fixes the problem, the longer it's off the longer it takes to reoccur. I'm pretty sure that one of the components is overheating and on the verge of failure. What are the chances that I'll be able to do something about this myself, or are the components too well hidden and integrated to make un-soldering a chip and replacing it a realistic expectation?

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Its far more likely some of the capacitors have bulged and/or leaked. reducing their function... its a very common point of failure.

IF you decide to try fixing it. remember there may be quite a high voltage and stored charge inside the tv.. especially the main smoothing caps in the powersupply will hold a charge for a very long time (the big ones) . be careful

Posted on Apr 08, 2017


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Posted on Jan 02, 2017

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SOURCE: Viewsonic VP2130b monitor no post black screen

Here is a suggestion:
By looking at the power board you should see the light, and where it is connected to, so diagnose the circut from that point foreward eliminating any potential of damging the board. try any cables or ribbons.

Posted on Jun 20, 2009

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SOURCE: my ViewSonic PJD6221 Projector shows scattered white dots on the screen

Your dlp chip is going bad and cannot be fixed economically. Several of the mirrors on the chip are hanging up and they won't come back. It will just get worse. My Sharp XR32X is doing the same thing. New projector time.

Posted on Jul 27, 2012

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I was given a ViewSonic 520 by my father, but he couldn't find the power cord or USB cable. What do I need, and where in my area can I get them? David Hart Fort Worth, Texas 76119

You don't need a USB cable to plug in the monitor. The VA520 requires a standard power cable, available at any electronics or computer store. Same one used for a computer power supply.

Feb 28, 2011 | ViewSonic VA520 15" Flat Panel LCD Monitor

1 Answer

I've got a 4 to 5 year old panasonic tx32pd50 tv and it has just started to show signs of a problem. when the tv has been off for a few hours and then turned on from cold the picture is distorted and...

The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.

Apr 07, 2017 | Panasonic Televison & Video

5 Answers

What voltage is the dc adapter?

You will need at least a 4 amp rated regulated 12 Volt power supply.
These are commercialy available from most electronics parts suppliers.
They come on a circuit board. You can mount it in your own case and
use the original Viewsonic wire end. If you do a google search for 12
volt reglated power supplies you should find many of these.

However, with a second-hand Sprint AC adapter with 3A,
12v adapter, the screen blinks on and off
intermittently. Obviously there is some difference here between a class
2 adapter and a power supply box.

Oct 03, 2008 | ViewSonic VA520 15" Flat Panel LCD Monitor

1 Answer

Old gateway desktop tries to start up but just shows white screen or menu

the last time my friend's old cp would not start and showed a white screen, it was nothing else than changing the power box that had gone dead from overheating - the fan was stuck hard since weeks!

Sep 06, 2008 | Gateway Computers & Internet

1 Answer

VA520 Resolution Message

Have you tried via the Control Panel/Display function?  The driver provides the means but Windows provides access to those settings.

May 24, 2008 | ViewSonic VA520 15" Flat Panel LCD Monitor

2 Answers

Sound, but no picture. Standby light blinking 5 times

A few weeks ago my set started flashing to a black screen. Now a couple of weeks later, i have no picture, but the set turns on and i have sound. The standby light is flashing. I purchased the set in 2000 so it is seven years old. This is the first problem. Could it be all three of the bulbs? Could it be all three of the bulbs? no as you say that sound is ok that means your power supply &high voltage section is ok. please check chroma ic luminance section or system control section stand by ckt ihanks

Sep 11, 2007 | Sony KP-53HS10 TV

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