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Viewsonic Monitor Blinking

 
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jools1976



Joined: 24 Apr 2008
Posts: 1

PostPosted: Thu Apr 24, 2008 4:45 pm    Post subject: Viewsonic Monitor Blinking Reply with quote

I've got a Viewsonic VX924 19" LCD monitor that will turn on, however, the power LED on the front will flash and the screen will blink the image for a split second, then go blank. It continues to do this in a cycle, about evey 2-3 seconds. I have narrowed it down to the power supply board. Upon initial inspection I noticed 3 bulging electrolytic caps, which turned out to test faulty. I replaced them, but I've still got the same problem. I can't seem to get my hands on a set of schematics either. Does anyone know where I can get some schematics, or give me any insight on troubleshooting the board? Thanks.
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minnie



Joined: 18 Aug 2005
Posts: 2880
Location: Hell

PostPosted: Mon Apr 28, 2008 11:33 pm    Post subject: Reply with quote

Keep checking caps. There's usually more than just a couple.
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PostPosted: Wed Jun 25, 2008 3:15 am    Post subject: Reply with quote

Yes - I have the same problem - The power supply is the likely culprit - If anyone has the schematic it would be greatly appreciated.
Thanks
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torbjorn



Joined: 07 Jun 2007
Posts: 370
Location: Sweden

PostPosted: Wed Jun 25, 2008 10:06 am    Post subject: Reply with quote

Most LCD monitor power supplies are fairly standard designs, if you can't find a schematic for a particular power supply, then look at the application notes and reference designs from the manufacturer of the controller IC (usually, Fairchild, TI, Power Integrations etc).
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SZASZ



Joined: 27 Apr 2007
Posts: 69
Location: TIMISOARA

PostPosted: Tue Sep 02, 2008 6:51 am    Post subject: Reply with quote

Hello,


Try to uncople the inverter. the inverter is powered using a 3.15 Fuse.

Maybe the Inverter has ocuured a fault.

See if the 12V is stabile. when you connect and siconeect the inverter.
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De Wang LCD



Joined: 07 Dec 2008
Posts: 1

PostPosted: Sun Dec 07, 2008 4:02 am    Post subject: Reply with quote

This is a general power supply circuit board capacitor above, you should replace the out OK
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PostPosted: Sun Aug 23, 2009 2:32 am    Post subject: Many Reply with quote

I am looking for a complete circuit diagram of VX 924 monitor and fuses locations?
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