Question about Princeton Digital VL1919 19" Monitor

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Blue light on monitor flashes on/off but no picture. Have to restart PC a few times and monitor finally detects and displays picture. Replaced VGA cable, no luck. Can this be repaired or need to get new monitor? Thanks

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More likely to have failed DC filter caps, see pictures here:

Basic LCD monitor and LCD TV troubleshooting guide:

Failed TV, Monitors, Caps :

Learn about bad caps:
Capacitor kits: he can make you a set of caps for you.
Please post back what you find.

Posted on Nov 14, 2010

  • Rod Young Jul 21, 2011

    That was EXACTLY the problem on my VL1919. The average person should simply get a new monitor, as this is not an easy repair unless you already have the right capacitors on hand and a soldering iron. Almost everything must be taken apart in order to get at the power supply board with the capacitors.

    Two pairs of capacitors were bulging - 1000 uF, 10V near the heat sink, and 220 uF, 25V in the center of the board. I was able to find 1000 uF, 16V capacitors, bag of 20, on eBay for $3 with free shipping. There were also 470 uF, 35V caps by the same seller, bag of 20 for $3. These were all rated at 105 degrees C. Be careful about going to Radio Shack - when I checked, those capacitors were only rated to 85 C. Since this is a heat-related failure, those wouldn't last long.

    I replaced the 1000 uF caps with the higher voltage type because they would fit, replaced the 220 uF with higher voltage and capacitance because they would fit, and while I was at it, replaced the 470 uF caps near the heat sink, even though they were not yet bulging.


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