Yep he sold them all so it looks like I have to replace LM1086... fun stuff! I can barely solder a powerjack to a laptop motherboard, and have some failed surface mount soldering in the past...
I ended up just ordering a whole working unit, won it on ebay auction for $153 + $40 shipping NOT BAD! I also ordered a LM1086 just to try this repair for $hits n' giggles, will probably end up selling it for parts LOL.
Tested the replacement unit today, works great! I almost feel bad for sniping his auction at only $153 but it was his own fault for putting 2 identical auctions ending within seconds of each other. The other ended at $250
Anyone want the aluminum housing/stand, or the Inverter Board or LCD from the old unit? I would assume the mainboard has an issue and the LCD is fine but can't guarantee that.
I haven't done the LM1086 replacement yet but I have the part, going to put it off until I have spare time.
Tested the replacement unit today, works great! I almost feel bad for sniping his auction at only $153 but it was his own fault for putting 2 identical auctions ending within seconds of each other. The other ended at $250
Anyone want the aluminum housing/stand, or the Inverter Board or LCD from the old unit? I would assume the mainboard has an issue and the LCD is fine but can't guarantee that.
I haven't done the LM1086 replacement yet but I have the part, going to put it off until I have spare time.
If you have the aluminum housing/inverter board and LCD, I could sure put it to good use. I have a few borked mainboards I want to repair and test.
IS there a single thread out there with as many one-time only posts?
Good point. Although to be honest, I will be contributing to this thread hopefully in the near future, as I have 2 dead logic boards from a pair of 23" ACD in which I plan to do the transistor swap.
Just waiting for Digi-key to ship out my stuff. ;-) I sure hope this fix works!
Just to update, I also had a slew of 23"ACDs that were exhibiting the short-long-short flash; cutting the ground cable allowed the monitor to turn up without an issue. (some people were using paper/electrical tape on the center leads on the cable that powers the monitor to the brick, but I wanted something more permanent)
This fix worked on 2 monitors, and have been good to go for the last few weeks.
I had 2 other monitors that were completely dead, no lights flashing whatsoever. I've read thru this thread and ordered 2 of the transistors mentioned from digi-key to replace the original 1117-3.3v transistor with the new LM1086. I used wires to extend the transistor away from the board, as the case of the transistor was much larger. (I like A1082's idea of trimming the transistor....will try that!)
Anyway, bottom line, IT WORKS! I'm stunned, but it works a treat! Anyone that has a dead ACD 23" aluminum should try this out.
I have the same model LCD and on the side of the inverter board by the USB and Firewire connections there is a white wire that someone pulled the connector off of and I dont know which one of the two the white wire goes to or how the connector goes. Does anyone have any pics of that area of the inverter board they could post or send me? Also how do you upload a pic? Do you have to have a HTTP site with the pics on it or can you upload from your local PC?
I just got a A1081 20" model, which shows no activity. But the ACD is recognized when I connect it to my Mac mini - I can also see that the chosen resolution is correct. It is also displayed correctly in the system profiler.
In a picture above I saw that there is a connection from the logic board to the display, but it came from a 23" model. In my case, the logic board has the same connector and there is also a matching connector coming from the display. But as you may see in the attached picture, they are not connected because the cable from the display is too short.
So I just took all my courage and moved things a bit to connect the cable to the board. Now all gizmos are online, the monitor displays a brillant picture and the backlights are still brillant. After I knew everything was working I just soldered extension cables between the logic board and the display connector and isolated them with heat-shrinkable tubings.
What I still don't know: What happened to the missing 5cm cable? Was there a cord extension they forgot when they opened the monitor for the first time? Did anyone take a look into that 20" monitor - the picture aboves shows that it fits perfectly with a 23" model....
Last edited by JeanLuc7; Jun 8th, 2011 at 08:26 AM.
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