Question about Princeton Digital VL2018W Monitor
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.
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
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
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
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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Posted on Jan 02, 2017
Tips for a great answer:
Basic LCD monitor and LCD TV troubleshooting guide:
Failed TV, Monitors, Caps : http://s807.photobucket.com/albums/yy352/budm/
Nov 22, 2010 | Princeton Digital VL2018W Monitor
Basic LCD monitor and TV troubleshooting guide:
Failed TV, Monitors, capacitors, and lamps pictures: http://s807.photobucket.com/home/budm/allalbums
Nov 11, 2010 | Princeton Digital VL2018W Monitor
Basic LCD monitor troubleshooting guide:
Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums
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