Question about Computer Monitors
I have a Liquid Video E19LCD1 monitor that has worked fine for about 3 years. Now when I turn it on, it shows the desktop for about 30 sec. and then goes black. Turning it off and on, or unplugging and replugging the video cable gives exactly the same behavior (30 sec. picture, then black). Computer works fine with an old CRT monitor and the LCD monitor behaves exactly the same on a different computer. Monitor power light stays green once turned on. I removed the back of the monitor and looked for any evidence of damage or swelling of capacitors etc. but see nothing unusual. Any suggestions would be greatly appreciated!
I acquired one of these at a flea market. Same problem, same solution as skotkolr's. The "runs for 30 seconds" or cycles on and off is caused by the run capacitor for the switching power supply controller IC. It's usually 47uF/25V and can be found on the AC hot side of the pc board near the controller IC. This fix works for many monitors.
Posted on May 05, 2010
Capacitors on the power board inside the lcd monitor have blown they can be replaced with new ones and the monitor should return to normal operation.
service center or if you feel capable you can do it your self with a soldering iron and the correct caps that have blown you need voltage and micro faradays usually 25 v at 470 mfd (u)however monitors use different kinds and voltages can be different it will be marked on the side of the damaged capacitors.
Posted on Nov 13, 2008
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