Question about Princeton Digital VL2018W Monitor

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About the VL2018W (BLACK) Monitor soultion you posted

Could you please explain what the 3-470UF 25v capacitors are. Did you experience the same prob w/ your monitor (blank screen w/ "no signal" mesg)? And replacing these capacitors solved the prob? I'd really aprecaite your response. Thank you.

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  • atlantaboy Oct 15, 2008

    I replaced all five (5) capacitors with 470uF capacitor before I realized that two of them are 1000uF capacitors. Can someone tell me the location by number of the 1000uF capacitors.

    .


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You need to replace 6 capacitors on the power supply board. Princeton uses CapXon brand capacitors which last about 1 to 2 years before going bad. CapXon are extremely poor quality capacitors, saving Princeton 10 to 20 cents per monitor.
This is the list of capacitors you need to replace. If they aren't bad now, they will be.
qty 2: 1000uF, 10V (DigiKey 565-1646-ND)
qty 3: 470uF, 25V (DigiKey 565-1677-ND)
qty 1: 470uF, 10V (DigiKey 565-1643-ND)

You can get United Chemi-Con replacements at DigiKey. The DigiKey stock number is listed on the above list. Since DigiKey didn't have stock on the 470uF, 10V at the time I ordered, I substituted a 680uF, 10V (DigiKey 565-1644-ND) which is a larger diameter, but will fit in the area provided.

Posted on Oct 09, 2009

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There are only three 470 uF capacitors. Two of them are 1000 uF.

Now the question is, which two? I saw this post and took out C241, C244 and C263 before noticing that two of the three are not 470...

Posted on Oct 02, 2008

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1. I found that Digi-Key sent CapXon caps with the given stock numbers.

2. I have 4 #2018 monitors, 2 of which I have rehabbed the power card. They still had the "out of frequence" (Princeton's spelling) message when brought up in other than vga mode, so I am thinking that when receiving the "frequency" error message, before replacing the caps one should fix the frequency mode to 60hz by using the MS DirectX Diagnogtic tool "dxdiag" (which was on my XP installs) and check your monitor--this overrides the prevailinig refresh rate and I hope solves the freq problem. My 2 pcs both have nVidia graphic software and no obvious way to fix the freq permanently. Here is the tip for dxdiag: "what you have to do is run dxdiag at the cmd prompt, the microsoft direct-x diagnostic tool. goto 'more help'. click on the last button, which says, "click on this button to override direct draw's refresh rate". put the number 60 into the box"

Posted on Nov 20, 2009

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There are actually five 470 uF 25v capacitors on the power supply. I replaced all of them and my monitor turns on...even shows picture. I think i have a bad transistor as well considering my colors aren't blending. I notice the "squeal" coming from the transistor, so that's what i figure is the problem. it is possible that i need to replace the other caps on the PS as well.

Posted on Apr 26, 2008

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1 Answer

Cannot find driver for VL2018W Monitor was working but then went blank Is it a goner or might the right driver help


Driver will not cause the screen to go black, look for bad caps inside, it is very common problem.
See Princeton VL2018 album.

Basic LCD monitor and LCD 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

Failed TV, Monitors, Caps : http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitor kits: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Nov 22, 2010 | Princeton Digital VL2018W Monitor

2 Answers

Hi I need to replace 3 x blown capacitors for my LCD monitor. They are 820uf 25v. Do they have to be an exact match ie ceremic/tolorences?


They can be 1000uf 25v (20% higher value is OK), higher voltage is also OK but it may not fit the board. The temperature rating must be 105c and Low ESR type which is very important for switching power supply. You should replace them in a set.
You can get the PANASONIC FM or FC series from DIGIKEY, or from Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

Oct 03, 2010 | Samsung SyncMaster 940N Flat panel Monitor

2 Answers

Monitor comes on then goes black


I've got a couple of these monitors that have the same problem. All the caps in the P/S except the large inverter filter (110uf/400v) are bulged. I;ve ordered all the caps - INCLUDING the one that doesn't look bad since all have been subjected to the same high heat (or are bad caps in the first place {Non standard?} so am attempting to prevent a recurring problem. Since all of them cost around $6 TOTAL (plus s/h) there's absolutely NO reason not to replace all of them. The ones in my monitors are: 1-22uf/50v, 1-100uf/400v, 1-470uf/10v,2-1000uf/10v and 3- 470uf/25v. I opted for the slightly higher voltages available when I ordered since that also helps and there's plenty of room. the 10v caps will be replaced by 16v ones, the 25v by 35v while the 50v & 400v will be the same voltage. Hope this helps somebody. Good luck and solder quick to keep the heat down.

Apr 18, 2010 | Princeton Digital VL2018W Monitor

2 Answers

Flicker then display goes black


your monitor got trouble at:
1) monitor inverter board components fail like capacitor or MOSFET diver, it can repair or change this parts to fix.
2) there is disconnection between the inverter and CCFL lamps
need to check by technician, it could be fixed,
3) check the DCpower supply board capacitors swelling which need to reaplace, and fix it.
all steps need to do and fix it well.
hope help you something fixed, please take a rating let me know how much helped you thanks! keep in touch your question

May 24, 2009 | Samsung SyncMaster 2233BW 22" LCD Monitor

1 Answer

Black screen


It is most likely that the filter capacitors on the power inverter board have failed. I took mine apart and found seven swollen capacitors on the this board, they fail prematurely and seem to be the only thing wrong with the unit. I replaced them and now it is working just fine.

six 470uf 25v electrolytic capacitors and one 220uf 25v Capacitor.

you should not attempt to repair this yourself unless you have some electronics training since there is a shock hazzard involved and also these capacitors will blow apart if they are installed incorrectly (very messy experience).

Jan 31, 2009 | Mag Innovision 19" LCD Flat-Panel 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

5 Answers

Can changing 3 capacitors on motherboard solve my problem?


We had a power surge and my VL2018W LCD monitor stopped working... blank screen and flashing blue light.

I carefully opened up the back and found the power board (the one the AC plug goes into). There were about 5 electrolytic capacitors that were bulging (but not ruptured). There were 3 with the values listed by the original poster (470uF @ 25V) and 2 with 1000uF @ 10V.

I scrounged a couple of 2200uF@10V caps for the last two and bought 3 470uF @ 35V caps from Radio Shack (P/N 272-1030).

Luckily, the monitor came right back up and seems to be OK. It was out of warranty, so there wasn't a big risk.

Just increasing the working voltage won't do that much for you. If any caps are bad, just replacing them with the same value is good enough, but a higher working voltage won't hurt (usually means a bigger cap).

Good luck.

Rich

May 04, 2008 | Princeton Digital VL2018W Monitor

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