Question about ViewSonic VA712B 17" Flat Panel LCD Monitor

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MY MONITOR SCREEN WENT DARK AT WINDOWS STARTUP THOW POWER SUPPLY IS THERE PLZ HELP.............

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Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses, poor solder jopints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed VIEWSONIC monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Posted on Jun 07, 2010

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Dell E173FP 17 monitor went dark and not working. I restart the pc it shows for only few second and went out again. I plug in one other monitor in my pc and it work fairly well. So something not right with...


Hi!

There are three possible cause why your monitor went black and start working..

1. If your monitor is dead set.. no reaction or lights turn on after power on.. then it needs to check if there is blown capacitor in its power supply section..

2. The high voltage ballast transformer of the backlight inverter is burned - it needs to be replaced so that it will not have a direct effect on the power supply section of the monitor.

3. The backlight inverters are all busted - the backlight was located at the upper and lower back edge of the monitor.. If these lights are busted then all that will be seen in your monitor is black screen.. It will need to be replaced so that image display will come out from your screen..

These 3 reason and its solutions can only be done by yourself if you have the knowledge, proper skills and the right tools to open the back cover of the monitor and replace the problem parts....

Otherwise, bring your monitor to a credible technician and if there is warranty,, avail of this...

Hope that answer your question..

Much appreciated if you rate this help..thanks..

May 20, 2010 | Dell E173FP 17" LCD Monitor

1 Answer

The monitor startup and few seconds later it turn


You are going to have to open up the monitor, please read below if you are going to DIY.
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed SAMSUNG monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

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The clicking sound you hear is the power supply board trying to start up, this indicates the board has failed. This is a common problem with all LCD monitors after a few years of use. Parts called capacitors on the power supply board fail and they will keep the power supply from starting up correctly. If you can solder then you can repair the board yourself. Here is a link to a repair guide with pictures and videos showing how to dis-assemble the unit and then what to look for and replace to rebuild the board and get the unit back running.

http://www.ccl-la.com/blog/index.php/repairing-the-samsung-920n-920nw-monitors/

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

BuddyMc

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I notice a difference in the setup of the two monitors, have you installed the correct driver for the new screen?

Try F8 on startup to get into safe mode, this should allow you to use the default VGA screen, and to reset the correct monitor drivers.

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Some searching on forums convinced me the inverter had failed. Picked one up for $65, removed the frame around the screen, removed the mounting screw for the inverter, and unplugged both ends of the old and plugged in the new. Put it back togeher and fired it up, bright again. Key here was that a remote monitor still worked which meant video card was OK. The lamp could have been bad, but apparently the life of lamps is pretty decent.

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It's sort of a solution, but I work in a computer shop and got this screen in yesterday. I looked at it closely and it's actually the backlight that died. I pulled it apart and found that three of the 820uF/20V capacitors had swollen up. If you replace them then you should be fine, but I went for a different approach and took the inverter board from a laptop and put the in the screen and used an external power supply. It's a bit dark but it works fine now.

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try to contact an expert technician of monitor maybe there is a part of your monitor that is already defective, the controller of brightness and contrast.

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1 Answer

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This just happened to me last night.  My web research indicates that the monitor is bad...others have had the exact same problem. 

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