Having problems with your ViewSonic Optiquest Q9b 19" Flat Panel LCD Monitor ?

DCAC40A4 power converter failure

\015 I removed the DCAC40A4 power converter from my Optiquest (ViewSonic) Q9 Model No. VS11201 LCD monitor. I was looking for a bad capacitor like so many mention but didn't find any bad. Then I noticed one of the two blue capacitors on the high voltage side is splitout on its side. I want to try and replace it but the info on the capacitor makes no sense\015\012F .33JPMD 250VThe period (.) in front of the 3 is actually positioned half way between the top and bottom of the 3. I have tried looking up this part but cannot find it anywhere. Can you help me identify this part?\015

Answers :

This is too funny. I have a Norwood lcd monitor with the same problem. It has the same exact board. I started to troble shoot and it is pretty tough without schmatics but there is a diode (d301) that I am getting a dead short across.
I think this is a dipped .33 uf or 3300pf 250v cap. I thought tantalum, but none are available at 250v, so I think it is ceramic.

http://www.badcaps.net/ has a forum and a section for computer displays. There is a recent post on a viewsonic there.

digikey.com has low cost/order shipping fees, mouser.com has parts too.
tom
Repair Help & Product Troubleshooting for ViewSonic Optiquest Q9b 19" Flat Panel LCD Monitor

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