Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

[Delmonte]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

I'd just like to say thank you for providing all the information in this thread.

I had the acer logo problem and bought the bits from Mouser.

Changed all the caps 1st then got a different problem.

Replaced the mosfets and the fuses with 1.5a and everything is running perfect again.

Thanks again.

[evilhero]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

help plz. I have this acer al2416w the problem is turn on but only yellow amber on. I tested the psu missing 24v and 12v. Only voltage show is 5v. The caps seem okie no blown up.

[jetadm123]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

And Rubycon ZLH should be a good replacement?

Found these in a local store https://www.elfa.se/elfa3~lv_lv/elfa...2-69&toc=19089

Rubycon ZLH is a very good choice. They will be physically larger than the original caps, but if you're careful, you should be able to get them to fit.

Also, check the 3 fuses on the board to verify they are good.

[kasp1js]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

And Rubycon ZLH should be a good replacement?

Found these in a local store https://www.elfa.se/elfa3~lv_lv/elfa...2-69&toc=19089

[alexanna]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

I think that would be a very good place to start

[kasp1js]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

Hello,

I read all the thread and tried to understand it all, but it was very confusing.

So
I got my hands on an broken Acer al2416w,

Symptoms are:
When I turn it on the acer logo shows for a second, then everything is black,
but if I use a flashlight I can see that the monitor is showing the picture, just the backlight isn't working.

I opened it and all the capacitors and mosfets seemed fine, no burnt smell or anything.

What should be my first step?

If I understand correctly, it should be an inverter or ccfl problem,

should I replace the 10 35v 100uf capacitors on the inverter board?

[pedro]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

Cant seem to find them on the badcaps link.
What about these Hitano brand??
http://www.ebay.co.uk/itm/20-Electro...item1c17b0e1fb

I don't know the EHR series, but I'm sure it appears on the Hitano website.

I have used , and continue to use, Hitano EXR 105C low-ESR caps in monitor repairs. Haven't had an issue or come-back yet. I suggest going to their website and comparing series.

[folinsbee]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

Cant seem to find them on the badcaps link.
What about these Hitano brand??
http://www.ebay.co.uk/itm/20-Electro...item1c17b0e1fb

[jetadm123]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

There seems a brown powder on the bottom of the cap.
Maplins in the uk has the caps only in 25V or 50v.
Are these any good?

Yes, those caps are leaking. As a matter of fact, there are 10 of those caps on the inverter board and they should all be replaced. The input to the inverter is an unregulated 24V, therefore, a 25V cap won't suffice. The original caps are rated at 35V. Recommended brand/series replacement caps are below:

https://www.badcaps.net/forum/showthread.php?t=2280

[folinsbee]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

There seems a brown powder on the bottom of the cap.
Maplins in the uk has the caps only in 25V or 50v.
Are these any good?

[PlainBill]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

Hj folks
I have the common problem with a acer monitor i was given. Acer logo for 2 secs.The screen was replaced and worked for 1 day so i opened it up and looked at the inverter caps.
There was a rusty substance on four of them .Could this be the problem ??

BTW i.m a novice on these things.

Maybe. There are two substances that could be called a 'rusty substance'. One is normal, one isn't.

It REALLY helps if you provide a picture using 'Manage Attachments' - below the test entry area.

PlainBill

[folinsbee]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

Hj folks
I have the common problem with a acer monitor i was given. Acer logo for 2 secs.The screen was replaced and worked for 1 day so i opened it up and looked at the inverter caps.
There was a rusty substance on four of them .Could this be the problem ??

BTW i.m a novice on these things.

[PlainBill]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

This thread is awesome! My situation is exactly the same as someone else described: found the monitor on the street, it turns on with the Acer logo and goes blank.

I was first suspecting the power supply because the 24 V rail turns off after about 4 seconds, even when neither the inverter nor the LCD controller board is plugged in. Is this also the case in your power supplies?

But then when I desoldered one leg off of each of the infamous 10 cap on the inverter board, it turns out that 5 of them show less than 1uF, 2 of them show about 20uF and only 3 show something close to the default 100uF. Bingo.

So, of course I have an issue with the inverter, but can someone confirm that in your operational/repaired unit the power supply also shuts down the 24v rail after about 4 seconds without the inverter & control board connected?

Good job of troubleshooting.

Designs can vary, but usually the power supply consists of a standby supply which is always on, and a main supply which is controlled by the signal board. It would not be unusual for it to shut down without the 'on' signal present.

PlainBill

[rafamart]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

This thread is awesome! My situation is exactly the same as someone else described: found the monitor on the street, it turns on with the Acer logo and goes blank.

I was first suspecting the power supply because the 24 V rail turns off after about 4 seconds, even when neither the inverter nor the LCD controller board is plugged in. Is this also the case in your power supplies?

But then when I desoldered one leg off of each of the infamous 10 cap on the inverter board, it turns out that 5 of them show less than 1uF, 2 of them show about 20uF and only 3 show something close to the default 100uF. Bingo.

So, of course I have an issue with the inverter, but can someone confirm that in your operational/repaired unit the power supply also shuts down the 24v rail after about 4 seconds without the inverter & control board connected?

[jetadm123]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

made it worse what ever that is i think i now need to replace it no more buzzing no more picture looks like inverter does not power up anymore due to me messing with that part

Try checking the 3 fuses on the inverter.

[singion]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

http://i185.photobucket.com/albums/x...n/inverter.jpg

re soldered all my caps and mosfets and the buzz seemed to move
linked a pick the what i now think is buzzing(what is it)

made it worse what ever that is i think i now need to replace it no more buzzing no more picture looks like inverter does not power up anymore due to me messing with that part

[jetadm123]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

If you get it working, please post a photo.

[singion]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

http://i185.photobucket.com/albums/x...n/inverter.jpg

re soldered all my caps and mosfets and the buzz seemed to move
linked a pick the what i now think is buzzing(what is it)

[singion]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

got the screen on again and the nasty buzz apears to be coming from the p2804 next to the p5504 that blew up (replaced all so the new one is noisy) old one i presume was also noisy as the buzz was present before)

this is what i purchased

http://www.chsinteractive.co.uk/elec...nce-8x11mm.htm

will try and resolder my caps a bit better

Cheers Singion

[retiredcaps]

Re: Acer AL2416 AL2416W 24" 1920x1280 LCD Monitor

i get about 2 second of picture hear a tiny click and screen goes blank

"2 seconds to black" is documented in posts #13 and #14 at

https://www.badcaps.net/forum/showthread.php?t=10419

Concentrate on

1) bad caps especially if you did not replace all the electrolytic caps or used the wrong ones
2) poor soldering
3) bad inverter transformer
4) bad ccfl and/or wiring