Acer AL2032W

[retiredcaps]

Re: Acer AL2032W

Post pictures of YOUR boards following the instructions below so we can possibly suggest test points.

[Tobsta]

Re: Acer AL2032W

I'm having the same problem on my acer al2032w, blue power led is blinking with a faint clicking sound from the speakers.
I disconnected all the plugs from the power board and it worked fine. (blue led stayed on and after a while turned orange and was possible to turn the power on and off with the switch).
I connected the inverter to the power board and that all worked fine too. the lamps light up the screen and the blue power led stays on then cuts to orange after a while. all good.
When i connect the screen to the power board then it goes back to blue flashing problem again.

can you guys help. All the caps look in good condition just the same as the pic above.

Here are a few pics of the power board.







Hope there clear enough.

[jetadm123]

Re: Acer AL2032W

Since your monitor uses an external power supply, measure the output of the power supply. It should be around 18VDC. If it's less than 18VDC, then the external power supply may be bad. Connect all boards back together and plug the power supply into the signal board (what you call the power board). Measure the voltage at the voltage input connector of the signal board. If it drops under 18VDC, then the power supply may not be able to support the additional load of the the LCD panel.

[Tobsta]

Re: Acer AL2032W

ok i will try that, thanks for the advice. I got the monitor off a friend (no wires included) i brought the power supply lead only 3 days ago but i will test it.

[wisconsinjimmy]

Re: Acer AL2032W

I do not mean to highjack the thread but could someone tell me the pinout for the power plug cw? I was given this monitor with no power supply which is not a problem just the power in pins.
Best to all
Jim

[gro]

Re: Acer AL2032W

If you mean the 4 bin din like socket its 18v 4.17A

a kind of looks like ------

[gro]

Re: Acer AL2032W

Ah the photo ... sorry first time here

[gro]

Re: Acer AL2032W

Hello BadCaps , here is my problem, quite similar to the others in here

My AL2032WD (D for the additional DVI box) has been slow to start up for
months, now it finally does not start. No blue light and sometimes the odd click from the speakers?

I checked the original 18v,4.17A external adapter was producing 18v.

I opened it up and found the same control board (tobsta posted), but a slightly different inverter board (saquib posted). No obviously bad caps in sight.

Putting it back together slowly I found I could make the blue light come on. I connected it up on VGA and the monitor starts up displays the ACER logo AND the BIOS boot text. The difference being I did not re-connect the DVI box. (connecting the DVI box and I am back to no blue light). Well VGA is good enough I thought..

Nope now on VGA when the BIOS has done its thing and OS tries to go to full graphics mode, the monitor shuts down the blue light on the monitor goes off, the green light on the external adapter stays on.

A simple power thing I thought ...

Back to the external adapter, spliced the wires to a DELL 19.5V,4.62A power brick. ...no change. VGA BIOS text ok, OS graphics no. 19v did not hurt (phew!), but did no good either, but its probably not a power brick problem (shame).

Does anyone have any ideas as to where I should be looking?
Does it make sense to try powering up with the inverted board disconnected?

Thanks in advance.

[gro]

Re: Acer AL2032W - sucess

Took a long time ,

with a hair drier I found the problem area was on the main board, not inverter, and yes the area of 16v teapo capacitors

I took on replacing all 5 16v 330uf capacitors ...

1x new butane soldering iron / flame thrower to get the capacitors out
a 30w soldering iron just wont do it.

My magic tool is a hand pumped Archimedes drill to unblock the holes..
after hours of trying to push a needle or capacitor leads through while heating/burning.. I thought the board would be toast after the hell I put it through but no ...

Just works, powers up no problem dvi working too.

This is my third capacitor problem fixed, the others an Apple Time Capsule (the infamous power supply) and a YFP900 sound bar (failed to power on).

Thanks to Badcaps.net (and Topcats great postings) for all the info.

[stickhead]

Re: Acer AL2032W

I looked at my main board and the 5 16v 330uf look good anyway to test them. I replaced 2 bad caps on the inverter still shows the screen logo for a few seconds then the power led goes to amber.thanks

[mathiasn]

Re: Acer AL2032W

Hi *,

had the 2s to black on my Acer F-20 (it's just a AL2032 in a different case).

Started replacing the 270 uF on the inverter (some weeks ago), which didn't help.
Today I got back to it replacing the 330uF (5 pc.; some looked a bit bloated) on the logic board.
That didn't help either. Still blue LED flashing, and clicking from the speakers.
Found similar behaviour like "Tobsta" above - disconnect display (30 pin conn.) and everything works just fine.
So I replaced C12 (22uF) buffering the panel power - didn't help

I then got out the schematic from the AL2032W Sevice Guide.

OK, here's what I found:
Seems the main processor is reset, once the display power (not monitor power, just the power to the display panel itself; the swich is Q4 if you want to loook it up) is switched on. There's a MAX809 (U8) providing this reset from the 3.3V power.
Ah, seems the 3.3V aren't stable!
I replaced the (2) 100uF (C48 and C53) near the 3.3V regulator (U4).
(in the pictures Tobsta provided it's in the upper right corner of the board)

Bingo! Monitor's as good as new now.

OK, back to using it as the display for my RasPi / XBMC mediacenter.

Hope this post will prolong the lives of many monitors ...
--
Mathias

[newtothis]

Re: Acer AL2032W

Hi *,

had the 2s to black on my Acer F-20 (it's just a AL2032 in a different case).

Started replacing the 270 uF on the inverter (some weeks ago), which didn't help.
Today I got back to it replacing the 330uF (5 pc.; some looked a bit bloated) on the logic board.
That didn't help either. Still blue LED flashing, and clicking from the speakers.
Found similar behaviour like "Tobsta" above - disconnect display (30 pin conn.) and everything works just fine.
So I replaced C12 (22uF) buffering the panel power - didn't help

I then got out the schematic from the AL2032W Sevice Guide.

OK, here's what I found:
Seems the main processor is reset, once the display power (not monitor power, just the power to the display panel itself; the swich is Q4 if you want to loook it up) is switched on. There's a MAX809 (U8) providing this reset from the 3.3V power.
Ah, seems the 3.3V aren't stable!
I replaced the (2) 100uF (C48 and C53) near the 3.3V regulator (U4).
(in the pictures Tobsta provided it's in the upper right corner of the board)

Bingo! Monitor's as good as new now.

OK, back to using it as the display for my RasPi / XBMC mediacenter.

Hope this post will prolong the lives of many monitors ...
--
Mathias

Well done on the repair, Make sure you used good quality caps and change any others too

[dodyweb]

Re: Acer AL2032W

Hi guys
The solution is simple for ACER AL2032 with blinking blue led....
Change mosfet nds9435 (Q4) on motherboard near to display conector...and voila it works!

[dodyweb]

Re: Acer AL2032W

or youy can simply bypass mosfet with a strap to suply 5v to lcd..