Question about Dell E198FP LCD Monitor
A little over a year ago, I bought a Dell E198FP monitor and the screen went black and the green power light went off. Power cords are working and everything is connected. Rechecked plugs and green light does not go on. I unscrewed 4 screws but I cannot get the panel off. Any suggestions?
Your monitor have a bad condensatorin the PSU.
The only thing to do is to replace the Power Supply Unit (very expensive, more than a new monitor) or if you have electronic tools, found and replace that condensator.(cheaper way...)
Posted on Jun 25, 2009
It can be a bit of a challenge to get the plastic bezel apart but those are in fact the only four screws...Once you find the "tabs" holding the two halves of the bezel together it's actually pretty easy. I suggest taking a putty knife and GENTLY prying at the seam until you find the tabs.
I suspect you will find that there are bad capacitors on the power supply board. There are two that I have found that typically fail (680 microfarad, 16 volt). They usually "bulge" on top after failing. I have found that the replacement value doesn't seem to be too critical. I wish I had written down the actual designators for these caps (maybe next time I repair one of these monitors). If you aren't handy with a soldering iron, however, I would not recommend this repair. It can be easy to permanently damage things. If you aren't afraid of that, however, give it a try.
WARNING! DISCONNECT POWER BEFORE DISASSEMBLING THE MONITOR AND DO NOT RECONNECT POWER UNTIL ALL SHIELDING IS REINSTALLED!!! DANGEROUS LINE VOLTAGE WILL BE EXPOSED!!!
Once you get the bezel apart and get down to the metal shielding, slide the shield on the right hand side to remove (arrows pointing to each other). There will be four connectors underneath this shield to power the backlight. Disconnect these four connectors, paying close attention to where they were connected.
Disconnect the small ribbon cable on the other side connecting to the front panel controls...There is a small black tab that will flip up to allow removal of the ribbon cable. CAUTION! THESE CABLES ARE DELICATE...DAMAGING THE CABLE OR THE CONNECTOR WILL DESTROY YOUR MONITOR.
There are four screws holding the power supply section to the LCD itself (two on each side). Once you remove these screws the rear shield (and power supply section) will start to separate from the LCD. There is another ribbon cable between the power supply section and the LCD panel...AGAIN...DO NOT DAMAGE THIS CABLE OR CONNECTOR! Squeeze the two black tabs on either side of this connector to remove.
You should now have the power supply board exposed. Remove the screws securing the power supply board to the shield. You will need to disconnect the connector attaching the AC power inlet to the board in order to access the top side...
The failed capacitors should be readily apparent. Replace them, re-assemble and test.
Posted on Oct 23, 2011
Condensator? Do you mean capacitor?
I have the same problem with my monitor. However, I opened up everything and all the capacitor on the power/invertor board looks good. I measured the output of the power board and there are 3.3V and 5V. I am not sure if this is how it supposed to be.
I am thinking may be the reset control circuit on the display board is bad.
Posted on Jan 18, 2010
I am guessing you might have fried your monitor... i'm not sure
Posted on Feb 05, 2009
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