Question about ViewSonic VX715 17" LCD Monitor
My viewsonic monitor is flashing on and off constantly the on/off button flashes with it my other monitor works fine so it's not the system, do i need to replace the monitor or can it be fixed
You have a problem in your power inverter board. Most likely cause is the FET (field effect transistor) conducting to ground. It controls the backlight for the monitor. Replacement boards are readily available. You can try www.lcdpart.com to order a replacement. Price should between 40-60 USD. It is fairly simple to change. The hardest part is getting the back cover off of the monitor. The part number you will need is right on the board itself. (Be careful not to touch the green cicuit board during the process) It will start with FSP-. It will be the number right at the edge of the board. Be sure to unplug the monitor and allow it to sit and discharge for at least 5 minutes before dis-assembly. This should help most of you folks who's monitors flash in this manner. This is typical for LCD monitors 4+ years old. Merry Christmas!
Posted on Dec 16, 2009
Lollypop6636, As long as the LCD panel has not been damaged or scratched or abused, then you should first try to find out if Viewsonic has a Refurbished monitor swapout program. You ship them your's + $50-$90 and they return a same model like new Refurbished unit with 30 day warranty. The symptom of a flashing screen leads me to think that the units power supply is having a very hard time keeping the two long, thin, "cold-cathode-fluorescent-tubes" lit up. They provide raw WHITE LIGHT so you can see the text, graphics,pictures and everything else that you see! The CCFT lamps are driven by what is known as an "electronic ballast circuit" !! They along with the other power supply(SMPS) are prone to failure. Another name for the ballast is INVERTER circuit. Your dealing with a technology similar to the new screw-in curlieQ energy-saving light bulbs whose ballast resides inside the oversize base of the bulb!! Anyway, if you can't do a swapout, You can check with the store where you purchased the monitor and see if they can be of some help. Also checkout youtube for video clips that show typical LCD monitor disassembly. the ones that are over 8 min long will be intersting and informative. Get backto me via email if you need more info. I hope thi has been helpful. bye for now lmistyrel@aim
Posted on Sep 28, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
Basic LCD monitor and TV troubleshooting guide:
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
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