Can't seem to open Acer AL2416W case

[Mike_S456]

Re: Can't seem to open Acer AL2416W case

I'm using a Fluke digital DMM so there are no range settings. After I test one pin I need to turn the monitor off and wait about 30 seconds or the backlights won't come on for those short two seconds. I don't understand that either. I will continue the test when my assistant returns tomorrow...Thanks for the help so far

[PlainBill]

Re: Can't seem to open Acer AL2416W case

Just adding a link to a schematic for an inverter using an OZ9925GN inverter controller.

Sorry it's not the same inverter you have, but at least now we know the pinout.

PlainBill

[Mike_S456]

Re: Can't seem to open Acer AL2416W case

Sorry..... I had to delay this repair because of some more important work....but I will be back at it tomorrow

[BShanahan14rulz]

Re: Can't seem to open Acer AL2416W case

As long as it's open, you might want to think about replacing at least the four caps in the first bank anyways: C34, C35, C36, and C38.

I'm still a noob, but of the two AL2416W's I've taken apart, those 4 caps were popped on both monitors. I used Panasonic FC's (meant to use FM's), but a word of caution: the ones I used are slightly taller and wider. Instead of 4 inline, I staggered them. Not quite as good as new, but I can live with it.

[alexanna]

Re: Can't seem to open Acer AL2416W case

I just got one of these monitors in, the power LED would come on to recognize a signal from the computer, But I could see no flash of the backlights and I was unable to see an image with a flash light.
Opening the monitor I noticed no problems with any of the capacitors, all the fuses on the inverter tested good, and I had 24 some volts going to the inverter. I was able to identify the 3.2V Back light on siginal,and it was making its way down to pin 15 of the OZ9925gn inverter controller.
This monitor uses a different type of CCFL connector than any I had available, I had some good CCFLs out of a 22” monitor, and by changing connectors I was able to substitute 2 CCFLs at a time. Each time I substituted CCFLs I noticed that all of the transformers were able to light the CCFLs briefly.
After reading the 2 threads on this monitor I tried replacing the 35V 100UF caps on the inverter, and this fixed the problem.

[jetadm123]

Re: Can't seem to open Acer AL2416W case

After reading the 2 threads on this monitor I tried replacing the 35V 100UF caps on the inverter, and this fixed the problem.

alexanna: you replaced the 100uf 35V caps with what brand/series? It would seem most of the aftermarket caps are a little larger in diameter than the originals. Did you have any trouble getting the new ones to fit properly next to each other?

[alexanna]

Re: Can't seem to open Acer AL2416W case

alexanna: you replaced the 100uf 35V caps with what brand/series? It would seem most of the aftermarket caps are a little larger in diameter than the originals. Did you have any trouble getting the new ones to fit properly next to each other?

I used a 50v 100uf Nichicon PW series, they were approximately 8mm x 10mm, they were installed at about a 45 Deg. Angle to the board.
I had to modify the cover for the inverter; cut out part of it over the capacitors, and fashion a shield from some spare parts I had to cover the cut out area, and secured everything with a little JB Weld.

[alexanna]

Re: Can't seem to open Acer AL2416W case

One of the reasons I wanted to present this in the forum is the fact I could not see any indication of a flash of the back lights, and not being able to see anything on the screen with a flash light. But it was clearly lighting my test CCFLs.
I am wondering in a case like this if we should suggest checking the BL on signal pretty early in the diagnosis?

[retiredcaps]

Re: Can't seem to open Acer AL2416W case

Member Maxxarcade just posted a youtube video on how to fix this monitor. See

http://www.youtube.com/watch?v=Xm0AJ65TGOI