Question about Liquid Video L17LCD2 17" Flat Panel LCD Monitor

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Vl1918 it poweres on and shuts off.repeat

I have a VL 1918 Princeton monitor that is malfunctioning. The symptoms are: it powers on and off continuously with a 'clap sound right before turning off. I have taken it apart and there is a hissing noise coming from one of the transistors or one of the other things ,for which, I do not know the names.The hiss is hard to hear and track and could be normal. Yes I am shooting around but, I would really like to fix it. I also know it is an older monitor I guess but, I would still like to try. It also is not under warranty. I am fairly handy and have always wanted to figure something like this out. Any directives as intricate and seemingly advanced as they may be I will research and try to execute. Thank you very much monitor gets video but flashes on and off

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You need to replace the "buldging" capacitors as that is a sign that they are bad. Go to Radio Shack & they can hook U up with the parts. Here's a good example of how to do it, and I have to say that I followed these steps & now mine works: http://www.wizardanswers.com/liquidvideorepair.html

Posted on Nov 30, 2008

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SOURCE: vl1918 it poweres on and shuts off.repeat

My VL1918 does the same- pings like a submarine and flashes on and off. I got the three 470uF 25V caps and replaced them-- in about 45 minutes my monitor was working again. I figured I had nothing to loose, it was going in the trash so I gave it a shot.

Looks like the caps are in the power supply- many monitors have an external power supply- would have been a smart move in this case. anyway this was a fairly easy fix- the caps I bought cost 39 cents each.

Posted on Jan 08, 2008

  • 53 Answers

SOURCE: vl1918 it poweres on and shuts off.repeat

Hello,
I have 1500 Princeston monitors in my labs.
the 1700 series need a high rated cap. the company used Caps that could not react to constant on off abuse.
The 19s are about the same If you only have two caps.
the Larger cap is25V at 1000uf replace with a higher grade cap at 1000mF at 25Volts
the smaller of the two is 1000uF at 10 V
replaced again with a higher grade Cap vauled at 1000mF at 10Volts.
Belive me after 300 of these it's the caps. if they are buldging or not.
If you have a VL2018w the kind I just repaired today and one that i am using at this very moment.
It uses 4 caps on an a seperate inverter board. all four must be replaced. and use the good stuff.
all four are 1000mF at 10volts.I use Nichicon Capacitors only.About 3.50 for the average joe.
I get them for .45 but I buy like 1000 at a time.
I just repaired 4 1708's and will be repairing 11 of them tomorow.
Like I've said when they work, they work well and we keep ours on 24/7/365.
for the money I'd go with a Philips 17" or 19" they make them better than thier plasma TV's.
Hope this helped.
44Hink

Posted on Nov 07, 2008

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1 Answer

My VL 1918 is blinking on and off constantly


It does the same when used with another PC?
Otherwise, look for bad caps, transistors, transformers as shown in my pictures here: http://s807.photobucket.com/albums/yy352/budm/PRINCETON/Princeton%20VL1918W/#!cpZZ1QQtppZZ20

Very common problem as you can see.

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 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.

Aug 07, 2011 | Princeton Digital VL1918 Monitor

1 Answer

How do I change the size of the image of a Princeton Digital VL 1918?


You can't change the image size as such actually on the monitor but you can change the size of the image feeding the monitor.
In windows right click the desktop, click properties in drop down menu then click settings.The setting should correspond with the native setting of the monitor which is 1280x1024 pixels and that is what you should set it to.
I hope I have been of help but please do not hesitate to ask if you have any further questions.
I appreciate your vote if you appreciate my reply.

Feb 24, 2011 | Princeton Digital VL1918 Monitor

1 Answer

Princeton vl 1918 monitor on screen it says check cable no signal. how do you obtain signal?


You need to verify to find out if it is the monitor is bad or the PC is not sending the video signal to the monitor. Try another monitor with the PC, if you still have the problem then you need to fix the PC, if it works OK then it is the monitor problem.

Basic LCD monitor troubleshooting guide:

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague

Oct 08, 2010 | Princeton Digital VL1919 19" Monitor

1 Answer

Princeton vl1918 flashes on than off


See previous solution for Princton Monitor cycling on and off.
Solution: Change out 3 capacitors.

Jul 15, 2009 | Princeton Digital VL1918 Monitor

2 Answers

Same problem


Check the Inverter card Connector which goes to pannel,Next Panel to AD card signal Cabble,..

Jul 10, 2009 | Princeton Digital VL1918 Monitor

1 Answer

Princeton 19" lcd vl1918 BACKLIGHT replacement


On the bottom of your monitor or on the right side is a set of buttons one is for brightness and contrast try to reset the brightness and then contrast. If this does not work you may need a new monitor.

Jan 25, 2009 | Princeton Digital VL1918 Monitor

3 Answers

Vl1918 it poweres on and shuts off.repeat


Hello,
I have 1500 Princeston monitors in my labs.
the 1700 series need a high rated cap. the company used Caps that could not react to constant on off abuse.
The 19s are about the same If you only have two caps.
the Larger cap is25V at 1000uf replace with a higher grade cap at 1000mF at 25Volts
the smaller of the two is 1000uF at 10 V
replaced again with a higher grade Cap vauled at 1000mF at 10Volts.
Belive me after 300 of these it's the caps. if they are buldging or not.
If you have a VL2018w the kind I just repaired today and one that i am using at this very moment.
It uses 4 caps on an a seperate inverter board. all four must be replaced. and use the good stuff.
all four are 1000mF at 10volts.I use Nichicon Capacitors only.About 3.50 for the average joe.
I get them for .45 but I buy like 1000 at a time.
I just repaired 4 1708's and will be repairing 11 of them tomorow.
Like I've said when they work, they work well and we keep ours on 24/7/365.
for the money I'd go with a Philips 17" or 19" they make them better than thier plasma TV's.
Hope this helped.
44Hink

Jul 09, 2008 | Princeton Digital VL1918 Monitor

1 Answer

Will Princeton monitor VL1918 support NVIDIA GeForce 6150 SE


Hi Alvie
I Just checked the specs on both the card and the monitor. It should work no problem. If for some reason you notice some lag or flicker in the monitor, go to this page and download the updated ForceWare graphics drivers.
http://www.nvidia.com/object/winxp_169.21_whql.html

Mar 27, 2008 | Princeton Digital VL1918 Monitor

18 Answers

Vl1918 it poweres on and shuts off.repeat


Just another voice to say that the solution provided here by others does indeed work.

Had same symptoms: screen comes on for about a second, a metallic popping sound occurs, screen shuts off for about a second, repeat. Problem occurs even if monitor is not plugged into computer (thus isolating it to monitor). Monitor purchased from Costco approximately two years ago.

Found 3 suitable 470uF 35V capacitors at the local Radio Shack for a little over $4 (more pricy than online, but no shipping cost, so it's a wash) Entire repair took less than 30 minutes.

The repair itself is already covered pretty well by others here, so I'll just add some disassembly instructions:

Set the monitor face down on a towel to protect screen. Remove 4 Phillips screws securing base to back of monitor, set base aside. Remove 3 Phillips screws from bottom edge of monitor cover. With flat screwdriver carefully pry along the other 3 edges to disengage the catches (about 3 per edge). Remove back cover. Identify the raised metal shroud containing the power supply module at center. Carefully lift one side of each piece of foil tape to expose connectors (for the short pieces of tape it's easier to remove the side that's laying flat, for the long piece at the top of the monitor, it's easier to remove the side that's vertical on the power module). Disconnect all cables, noting how to replace them later. Remove 4 Phillips screws securing the power module. Remove the power module and set the rest of the monitor aside. Flip the power module over, orient it such that the plastic covering is on the left (done only so that these instructions make sense). Carefully pull up the plastic cover from the right circuit board near the center of the power module, you can leave it attached to the metal shroud at the left side (it is difficult to remove from the metal without damaging it). Gently bend (without crimping) the plastic back and out of the way and remove the 4 Phillips screws securing the left circuit board (the one with the power connector). You will need a small "jeweler's" screwdriver for one of the screws - make note where that screw goes (top right of circuit board, or top center of overall module, when oriented as I did). Slightly tilt the left side of the circuit board up, and slide the circuit board out and to the left, over the bent back plastic, disengaging a connector from the neighboring board.

Then perform repair, and reassemble in reverse order.

Thanks to all who posted the original solution!!

Nov 15, 2007 | Princeton Digital VL1918 Monitor

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