Having problems with your Dell UltraSharp 1905FP 19" LCD Monitor ?

My Dell 1905FP LCD monitor Power light blink on startup

\015 I have a 3 yr Dell UltraSharp 1905FP LCD monitor. Recently, when I turn it on, the power on green light would blink continuously for about 1 minute with no picture before the light become steady green and have picture (everything working). Now it is up to 5 minutes. Other than waiting for the monitor to display the video, everything is fine. It acts like it is waiting for something to warm up. Does anyone know what is the problem? Thanks.\015

Answers :

It's most likely a couple of the eletrolytic capacitors on the power supply board. This type of cap can go bad over time, and that would lead to the symptoms worsening over time like yours has. It's mostly likely a couple of 10V, 100uF caps in my experience. They should be easy to identify: they will be the ones with the top bulging upwards. Replace those and you should be good to go! If there aren't any bulging caps, just replace all the 100uf caps. (there should be no more than 5)
\015\012
\015\012If you attempt this yourself though be carefull: any caps that haven't gone bad can hold a charge even when the monitor is powered off. Depending on the capacitor of the cap, accidentally contacting the leads on a charged cap can be anywhere from painfull to dangerous! A preventative measure is using an insulated handle screwdriver, short both leads of the cap together on the backside of the board to drain the cap.
Hello,

This is a classic symptom of filter capacitor failure on the power supply board. The Dell 1905FP and 1907FP both use the same power supply and this type of failure is very common. You can repair the unit by replacing the filter capacitors on the power supply board. Here is a picture of the board with the problem capacitors circled and below is a link to a repair guide for this series monitor.


9_24_2012_8_40_16_pm.jpg

http://www.ccl-la.com/blog/index.php/repairing-a-dell-1905fp-1907fp-lcd-monitor/

I hope this helps,
BuddyMc
Repair Help & Product Troubleshooting for Dell UltraSharp 1905FP 19" LCD Monitor

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