ViewSonic VX922 19" Monitor
Problem for ViewSonic VX922 19" Monitor

Viewsonic VX922 monitor no power




By davidsilv445 on Aug 31, 2009

" "
Hello, I have seen that the VX922 has a problem with the PS capacitors when the green led starts blinking. I have a VX922 but it doesn't power any led. I checked the power supply and I found two 470uF capacitors blown (dommed). I replaced them bud still no life signals. I decided to replace two more 330uF capacitors and one more of 10uF but still nothing.
I have seen that some of these power supplies have more capacitors and more regulation diodes. Mine has only the electrolitic capacitors I have replaced and one more big of 100uF 400V that is the only one I haven't replaced but is not blown.
I've checked the 12 volts and the 700VAC voltage and there is nothing.

My PS has also two heat sink one straight attached to a with a three pins IC? with the following info:
CET
5410Z
CEF04NG
I have no idea what is it and the board is a bit brown close to it so I suspect could be burnt. The other heat sink is "L" shaped and has a three pins Shotki diode? MBR10100CT close to two 470 uF capacitors I have replaced.

Any Idea of what is the first three pin component I mentioned?

There are diferent types of power supplies for this monitor?

Any sugestions of what I should replace?

I uploaded a picture of my PS:

http://2.bp.blogspot.com/_RrAfhxxyDV8/SpvLgAJczxI/AAAAAAAAAAM/jlC1FJWv5RM/S220/PIC-0005_3.jpg

Thanks a lot in advance
Comments:

Aug 31, 2009

- Hi buddycm. The power led is not blinking. There is no power at all. When I press the power or any other button, nothing happens.

Aug 31, 2009

- The led is not blinking and nothing happens when I press the power button or any other button.

Aug 31, 2009

- I double checked the polarity and it's ok. The new capacitors I solded are the following: 2 x 470uF 50v REC 2 x 330uF 25v SHOEI 1 x 1OuF 50V PHILIPS

Sep 11, 2009

- Hey I'm working again trying to repair my VX922, the good news is I have power, the green light is steady and I can see something on the screen when conected to a pc but now I have no Backlight :( I conected the power supply and tried to meassure the 700VAC with my cheap multimeter but I have nothing... Is there a problem if I change the pink and blue connectors of the backlights? I suppose thei don't have polarity but I'm not sure. I forgot the order but I tried several options but still no backlight. Any sugestions?

Sep 11, 2009

- By the way thanks buddymc for your sdvises.

Sep 11, 2009

- The green light is steady. I have power but I have no Backlight. I can see something on the screen but no backlight at all. Can I check the High voltage directly on the boart to be confirm if the problem is the board or the backlights? Thanks.

Clarification Request

Posted by buddymc on Aug 31, 2009

Hello again, The next thing to check is that the capacitors were installed with the right polarity( the stripe on the side going the correct direction). Also the capacitors that you installed what brand and series are they? Buddy

Posted by buddymc on Aug 31, 2009

Hello, Is the power light still blinking? Or is the problem worst now with no blinking? Buddy

Solution #1

posted on Oct 09, 2009
Not Rated)

razmanx

Rank: Apprentice 
Rating: 0%, 0 votes
hello ,I have a problem, witha the same monitor, i have green ledwhen i open the pc it start blinking orange, i tried to open it to check the components but I cannot take out the back plastic, I took out all the screw behing but then, how did you manag it to open it?
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