Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

Oh, and the caps are not bulged in any way.

The problem was the cap value. Completely out of circuit, they still read perfect ESR, but two of the caps were at 61 uF and 12uF. Go figure.

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

I wanted to add something here that I haven't read in this thread. I too have a couple of Acer 2416 that come on for the ACER logo, then the backlight went dead.

I checked all the caps with an ESR tester, with one leg lifted off the PC board. (I'm a board level tech, and know my way around these units.)

What I found with some experimentation is that the backlight would only come on for under a second with all 6 connected, but would stay on for about 2 seconds if I disconnected any 2 out of the 6. This...

I'm not sure if this has been covered here, but I figured this post might help someone....

As a sideline to my CRT projector repairs, I have gotten into refurbing LCD computer monitors, from 15" to 22". I have a deal going with a couple of local computer stores that I get all of their bad trade in monitors... So I've been through about 200 now, and the vast majority of problems, dead monitors, intermittent backlight etc, are indeed due to bad capacitors. That topic is covered here to death, so I won't touch it.

About 50 monitors that I've been stockpiling...

Re: Gateway FPD2185w- backlight dies after 3 seconds

Good point Bill, I'll try that. AS I said, it is challenging cutting my teeth on these, different from the CRTs that I've worked on for 15 years, but at the same time frustrating when you spend 2 hours on something you can only resell for $75.

Thanks again!

Re: Gateway FPD2185w- backlight dies after 3 seconds

I am getting about 10 monitors a week in. I am stockpiling known working parts, but of course I have nothing in stock currently that fits those 6 pin Gateway connectors. Figures!

Re: Gateway FPD2185w- backlight dies after 3 seconds

Thanks for the info. I agree, it could be that both sets hvae backlight /CCFL issues.

I also forgot to post that I did check all caps and scoped the power supplies on both sets, and both were right on the money.

It's tempting to buy a used working monitor off ebay just to isolate the problem, but I'll hold off for now, and will dive into this again next week.

Also, another thought occurred to me: Does the protection circuit sense opens as well as shorts? Regardless if the CCFLs are...

Hi guys, new to the forum, but a fairly experienced electronics board level tech here.

I've recently gotten into repairing flat screens, and am cutting my teeth (and pulling out my hair) as the learning curve goes..

I've got about 50 computer monitors through the door here, and have been about 70% successful overall, and my junk bin is full of garbage Chinese capacitors.

Anyways, onto the current issue:

I've got two Gateway 21" widescreen monitors with identical problems. Both lose the backlight about 2-3 seconds after powerup....