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did replacing the three 470 microF capacitors on the Power supply fixed the problem?
I talked to an outfit called www.monitorv.com and they sell a 'repair fit' that 'reuires soldering' - for $25. is there more to it?
From other posts here the repair kit appears to be just the 3 caps and instructions to unsolder the 3 blown caps and replace ( solder back in) the 3 new caps. Once you get the back off the monitor and start taking it apart you will see 3 capacitors- they are labeled with 470uf25v- it is the only set of 3 caps.- in the power supply ( near where the 110 power plugs in). - Go ahead, take the monitor apart- look for the capacitors- do you see them? If it looks like unsoldering them and replacing them is something you could do- give it a shot, what have you got to loose.
to see pictures of capacitors and to find way more information than you probably want to know - check out www.badcaps.net. - bad or blown capacitors seems to be a problem with motherboards and evidently monitor power supplies also.
I ordered my caps from Mouser.com- Shipping costs about the same as a gallon of gas and I didn't have to hunt them down. I ordered their part number 647-UHE1E471MPD6.- There are lot of capacitors of this type listed and honestly I just nearly randomly picked one with the same spec and size- but a different brand since the original ones blew. These fit the existing holes on the board exactly and were the same physical size so they didn't get in the way of any other components when I reassembled the monitor.
look at the caps carefully or take a picture before you remove the old ones, to be sure you get the new ones in correctly- there is a positive and negative on them!
My monitor has been working fine since it was repaired in January- 5 months ago.
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Hi! The reason why the button of your monitor flickers is because the 12 volts output supply for your inverter board is not stable.. If you have the skills and the right tools for this, Here's what you need to do 1. If your monitor comes with a power supply adapter, open it..check and replace blown capacitor with same value.. 2. If your monitor is using a cable power cord..open the back cover of your lcd..on the power supply section.. check and replace blown capacitor. 3. Check and resolder the terminals for fixing possible loose connections. 4. On the inverter board section...check and resolder the terminals for fixing possible loose connections, the high voltage inverter usually loose connections when overheat. 5. Other things to check if step 1 to 4 did not resolve your problem. Check and replace burnt high voltage transformer.. Check and replace busted backlight inverter..
This is a typical symptom of a failure of the capacitors on the power supply board. When the filter capacitors go bad the power supply can not start up correctly so you get flickering or even no display. You can repair this unit by replacing the bad capacitors and a fuse on the power supply. This is an easy repair, it just requires a little soldering. Here is a lin to additional information on which capacitors need to be replace and also here is a picture of the power supply board with the capacitors and fuse circled. http://www.ccl-la.com/catalog/product_info.php?products_id=229
Please post the pictures, that will help. Do find any fuse in the inverter circuits, if you do have 5v (for logic) and 12v (for backlights), then may be the power supply is OK but I am not sure that the inverter is using 12vdc since you have some caps rated at 35vdc, Iwould expect the inverter to be using 24vdc for backlights. See some of the pictures I posted here: http://s807.photobucket.com/home/budm/allalbums
The clapping sound could come from a bad "spark gap". The only other thing that I can think of right of the top of my head is a bad "High Voltage (2nd Anode) wire or connector. I f you can possibly operate the monitor with the back off and the lights off in a darken room, you might be able to see the sparks or use a small rubber tube, place one end in your ear(not too far, the place the other end around the High voltage transformer to listen for the arcing. KDonald
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.
A flickering screen indicates the power supply is not properly filtering the output power. This happens when the capacitors on the power board start failing. Here is a link to a repair guide that shows how to dis-assemble the unit and what to look for and replace on the power supply board. The repair guide also has videos showing the process.