Question about Princeton Digital VL17151 17" Flat Panel LCD Monitor

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Princeton VL1715-1 trying to identify the two capacitors C914 & C915 to replace them. Can you hlep?

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I can give you the way to decipher the capacitor manufacturer codes, on the side of the capacitor.

This way you can find out what Voltage they are, and what Microfarad's.

1.Japanese and Taiwanese Electrolytic Capacitors,
http://www.hardwaresecrets.com/article/595
(Reading all 4 pages of the article is relevant to identifying)

Posted on Sep 04, 2009

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Describe your (VL1916) 19" LCD


Did you try this monitor with another PC and already verify that the VGA cable is OK.
Common problem with Princeton monitors are due to bad DC filter capacitors in the power supply board, see example here:

http://s807.photobucket.com/albums/yy352/budm/PRINCETON/

Sep 10, 2011 | Princeton Digital VL1916 19" LCD Monitor

1 Answer

I have a Princeton VL1715-1 LCD screen that was turning off after about a minute or 2 then would not turn back on without setting for a while. The LCD still works when off, just the backlight turns off. I...


Yes, pictures will help a lot, it sounds like they are ballast capacitors for the backlights lamps, they should be closed to the lamp connectors, one per lamps.
Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.
Please leave rating if it helps.

Jan 27, 2011 | Princeton Digital VL17151 17" Flat Panel...

1 Answer

Princeton vl1918 monitor blinks repeatedly on & off, power light stays on; not a power issue


The 5vdc for the logic is probably OK (taht is where the power LED gets the power from)
It is either the power issue in the 16~18vdc power supply due to bad caps with domed tops for the inverter circuits, or bad components (transistors, transformer, etc) in the inverter circuits.
See my pictures here: http://s807.photobucket.com/albums/yy352/budm/Princeton%20VL1918W/
Make sure to replace them in a set.
If you are going to DIY and already try the monitor with another PC, and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, 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 PRINCETON monitors to get some ideas what to look for: http://s807.photobucket.com/albums/yy352/budm/
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: 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.
Please leave rating if it helps.

Jan 21, 2011 | Princeton Digital Computers & Internet

2 Answers

My LCD Monitor is blinking on & off constantly


It may need a different outlet, if it is not getting proper power. Small chance that the video cable has gone bad, but more likely the monitor is damaged. But try those two things and call Princeton.

Jul 12, 2009 | Princeton Digital VL1717 LCD Monitor

1 Answer

When it's turned on, the light on my Princeton monitor blinks...


I just did this capacitor replacement today after reading these posts. It worked great! I used 470uF
35volt caps from radio shack. There are three 470uF caps two right next to each other and one off by itself on the printed circuit board. The values are easily seen on the side of the capacitors. Open the monitor by removing the screws and prying the halves apart using a large straight edge screwdriver. There is a metal cover over the printed circuit board that will come loose after removing screws around its edge. There are several wire sockets that must be unplugged to allow the circuit board to be flipped over to reveal the capacitors. The board itself is held down with three screws
Once you identify the capacitors, use a fine tipped soldering pencil to melt the solder holding the capacitors in place and remove them. Position the new caps with the dark stripe matching up to the lined marks on the board, carefully apply just enough solder to each terminal to hold the caps in place. Reassemble and you're done.

Sep 18, 2008 | Princeton Digital VL2018W Monitor

1 Answer

Princeton Monitor


There is a field of capacitors on the power board that usually goes bad. I believe that there is a total of 6. When you look at the power board you should notice them. I have the capacitors if you need them. $2 each. Just check to confirm that they are swollen. and let me know the voltage and uF. good Luck. David

Jul 05, 2008 | Princeton Digital VL1916 19" LCD Monitor

3 Answers

Sony Dav-C770 blinking standby light product will not function


I had the same problem, red blinking light after owning for several years. I decided to replace the capacitor at C914 to see if it would work, and it did. Apparently that capacitor is prone to failure. Since this seems to be a common problem, I created a web page detailing the repair. Hope it is helpful. Repair cost $1.39 + tax.
http://hancockfamily1.googlepages.com/dav-c770repair

Jun 04, 2008 | Sony DAV-C770 System

1 Answer

Princeton VL1919 repeatedly pops when turned on


If you feel confident take the monitor back cover off and replace the 3 bulged out capacitors

Jan 26, 2008 | Princeton Digital VL1916 19" LCD Monitor

4 Answers

Blinking standby light system will not turn on


I was having a similar problem and determined that there was a short in the speaker leads for the center channel speaker. The leads to the speaker were touching, after being moved, slightly while housecleaning. Once short was eliminated, unit powered on and worked with no problem.

Oct 21, 2007 | Sony DAV-C770 System

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