Question about Envision EN-7220 17" Flat Panel LCD Monitor

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I posted a problem in which my monitor was cycling on and off. I have been told that it is apparently caused by blown capacitors, probably in the power/inverter board. But how do I get in to try to fix it? I have removed the visible screws and the screen bezel, but the screen is still firmly attached to the rear of the case. What to do?

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  • davagain Sep 29, 2009

    everyone seems to agree that the most likely culprit is a blown capacitor on the power board. Also, the consensus is that it is not worth fixing. Therefore, I felt that I had nothing to lose by tearing it down. Worst case - its junk. Best case - it works. Anyway, I finally got the screen out of the rear case - it was just held in with catches. I checked the power board and found a visibly bulging capacitor. I know there could be another bad one that looks fine, but I'm going to start by replacing that one. Getting access to a single capacitor at a reasonable price has turned out to be a challenge, but I think I have it worked out. I did check the service manual and the layout appears to be pretty logical. I will probably not end up with any leftover parts (famous last words, right up there with General Custer's "they look friendly") Well, we'll see what happens when the capacitor arrives...

  • davagain Jan 20, 2010

    UPDATE: The capacitor arrived, I de-soldered the old capacitor, replaced it with the new capacitor and viola - works like new! (and no left over parts). The 2 biggest challenges in the whole project: (1) prying open all those latches without damaging anything and (2) finding the replacement capacitor at a reasonable price. All in all, not an unpleasant process.

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Davagain, Just now saw your new post above. If you are intent on delving inside your unit, let me caution you to be very careful in doing the disassembly. Above all else, you must take care to not do more harm than good!! That said, you should try to find and view some video clips on youtube that will demonstrate LCD monitor tear-down. The ones that are >8 -12 min run time should be of help in your quest to "PART" the rear cover from the front BEZEL which holds the LCD panel. Right now you are at the most difficult and dangerous STEP!!! Use extreme caution in any further disassembly procedures. There should be no need to remove panel from the bezel. If digital camera is availiable use it to do your DOCUMENTATION of how things came apart so you can reassemble without having "LEFTOVER" parts. Good luck guy. Do you have a large magnifiying glass to inspect soldering of the printed circuit boards? get back to me with results of inspection. louie12fix or lmistyrel @aol.com Bye for now.

Posted on Sep 29, 2009

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See my response to the questioner "rlwalker393" just above yours.

Posted on Jan 17, 2010

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Post the pictures of the caps of the board will help also.
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