Question about ViewSonic VG2021m LCD Monitor

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After pressing the power on button it starts to turn on but then makes a hissing sound and goes into standby mode. It takes several attempts before the screen wont make the hissing sound and finally stays on.

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Hello,

You have a monitor with a failing power supply. The Viewsonic VG2021M monitor uses the DAC-12M033 power supply board. After several years of use the capacitors in the power supply start failing and not keeping a charge. The capacitors are on the output side of the power supply and help filter and stabilize the voltages. When they fail the power does not settle when you turn it on so you have to do the on/off/on/off to get it to start. If you can solder then you should be able to repair your monitor. Check out the article on our site at: http://www.ccl-la.com/blog/index.php/repairing-the-westinghouse-lcm-20v5/ it is for the Westinghouse LCM-20V5 but they both use the same board so the repair information is the same. If you don't want to do the repair yourself we do offer a repair service for this unit, it runs $32 plus shipping. You can get more information on this service here:
http://www.ccl-la.com/blog/index.php/service-request-form/

I hope this helps, if so please rate our solution.

CCL Tech
Corporate Computer
www.ccl-la.com

Posted on Oct 27, 2010

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