View Full Version : AOC LM729 Fix


khat17
01-25-2008, 08:49 PM
Yea, that's my monitor - AOC LM729. It was working all good and dandy, when about two weeks ago I noticed that it was getting harder to turn it on. I'd turn it on, it'd show me some pretty colors, then my desktop, then go blank. After doing so a few times it would finally come on. I figured it was dying, but didn't have the cash just yet to shell out for a new one. Decided to "rim it" till it died. Today it finally did. Ack. Friday evening, and all the electronic stores were going to close.....Options included using my TV, or a REALLY OLD 14" monitor I had. Nope, didn't want to do that.

My searches online led me to this place -> http://www.lesliewong.us/blog/2005/05/02/h...omment-page-18/ (http://www.lesliewong.us/blog/2005/05/02/hp-pavilion-f1703-flat-panel-display-blackout-solution/comment-page-18/)

This dude was doing a quick repair to his HP Pavilion F1703 display, not my AOC LM729. I checked it out and realized that the site got a hit because someone was asking about how to disassemble my screen - which is what I was searching for. Using the pics and such from the site, I fudged around with mine and got it working. Here's a quick copy/paste from my post on that site:

To open the AOC LM729, what you need to do is pop off the silver front outer lining. It is held in by clips along all sides.

1. Remove the outer lining of the front using a small flat screwdriver, going from the top, then sides, and then finally bottom. Doing it in this order will make it easier to remove the bottom, as the bottom side is underneath the built-in speakers.

2. Screw out and remove the built in speakers. The speakers are attached using a grey cable, with the same dimensions of an IDE or Floppy cable. 4 Strands.

3. Remove the stand from the monitor. You may even want to do this first (which I did). All it takes is a small, flat screwdriver, and a phillips screwdriver. Pop out the cover right where the stand/swivel arm is, and you’ll see four screws. Just remove them and your stand is off.

4. Next, remove the screws holding in the display. There were 7 of them on mine. 4 at the bottom, 3 at the top.

5. After removing the screws, the screen is held in only by clips at the sides. Just pry the plastic away on either side, and you’ll have the screen out.

After you’ve gotten it out, you can basically follow the instructions here to finding your problem. On mine, I noticed a swollen capacitor. Going in the town now to get it replaced.

And after that was done [replaced 1000u 16v capacitor], I'm all set and back up and running! So no new monitor for me for now - so sad.........NOT!!! I'll run it out until it fails again. If I can't fix it at that point, THEN I'll go get a new one.

PeAcE.

khat17
02-29-2008, 01:15 AM
http://idforums.net/index.php?showtopic=33319

See the above link for videos and lots of pictures on the disassembly and such.

PeAcE.

GRim
05-31-2008, 06:12 PM
www.badcaps.net


how to identify / replace / repair (most) PCBs with bad capacitors.

(Id rather not get started on the topic... lol).

khat17
06-01-2008, 09:09 PM
Last post in the link at IDFORUMS already has the url for badcaps, but it's not a bad thing to have it posted twice - on two different forums. And you could go into a small rant about caps. You have - after all - taught me all I know about bad capacitors.

PeAcE.

GRim
11-12-2008, 10:44 PM
Rant indeed.
Esp considering that we're STILL seeing ENTHUSIAST boards coming unto the market.. that feature defective capacitors. - the motherboard manufacturers being fully aware of the mess that went down.

Though, I suspect it has a great deal to do with how the other components of the boards regarding voltage regulation.

Nowadays they're putting some cheap mosfets unto the boards too.

When I go for parts.
I go above most else, for longlivity.

Thats a hard task nowadays...

They just dont make them like they used to eh khat? :rolleyes: