ACER AL2423W - no display

[dondrusco]

Re: ACER AL2423W - no display

Hello Dondrusco
Curious as to whether the symptoms on this one was also down to P/Supply caps, can you enlighten me
Thanks in advance
bob

My theory is: capacitors need some time to 'warm up'.
They have to filter peaks from switching power supply. Feedback control lower voltage to protect from overvoltage. It rises slowly to required 5V

[Bobdee]

Re: ACER AL2423W - no display

Nice example of AL2423W behaviour with bad caps

http://www.youtube.com/watch?v=tWzPk08Ayk0

Hello Dondrusco
Curious as to whether the symptoms on this one was also down to P/Supply caps, can you enlighten me
Thanks in advance
bob

[dondrusco]

Re: ACER AL2423W - no display

Nice example of AL2423W behaviour with bad caps

http://www.youtube.com/watch?v=tWzPk08Ayk0

[dondrusco]

Re: ACER AL2423W - no display

Good job on repairing the monitors. While increasing capacitance value by nearly a factor of 5 isn't recommended, when values available are limited, you have to do what you did. Glad it works.

PlainBill

YAHOOO - I replaced 470uF capacitor with correct 100uF - now it detects correct resolution 1920x1200 on VGA input.

Thank you, PlainBill

[dondrusco]

Re: ACER AL2423W - no display

As far as the resolution, is it possible the video card is putting out 1600 x 1200, not the 1920 x 1200 you want?

PlainBill

It's too strange. Resolution is 1920x1200, but monitor detects 1600x1200. It tries to interpolate. Picture isn't so sharp, as in native 1920x1200. I tried to change VGA cable - no change.
DVI detects correct resolution 1920x1200

Graphic card is Matrox G400 - excellent D/A converter.

[PlainBill]

Re: ACER AL2423W - no display

I bought another one AL2423W - the same symptoms and bulged identical capacitors. I replaced all. Now it works. Excelent brightness.
But I haven't got one 100uF/25V - I replaced it with 470uF (12V branch)
Might there be any problem with it?
The monitor has only one issue - when VGA cable is connected, electronic wrongly identifies mode. Instead of 1920/1200 only 1600/1200. Probably another capacitor in electronic.
DVI is OK

Good job on repairing the monitors. While increasing capacitance value by nearly a factor of 5 isn't recommended, when values available are limited, you have to do what you did. Glad it works.

As far as the resolution, is it possible the video card is putting out 1600 x 1200, not the 1920 x 1200 you want?

PlainBill

[dondrusco]

Re: ACER AL2423W - no display

I will add another ACER - AL1921. The same symptoms as AL2021 - no blue LED.

Typical issue - bulged capacitors. I replaced bulged only. Monitor is OK now.

The second one has cold join under L101.

[dondrusco]

Re: ACER AL2423W - no display

I won't start new thread, I will add another monitor of ACER brand.
AL2021. It won't work. No blue LED in off mode.

Typical issue - bulged capacitors. I replaced them all. Monitor is OK now.

I want to use brand capacitors, but I'm not able to buy it in Slovakia. I tried to order from Mercateo.at, but they have minimal order 100 EUR.
I have to use YAGEO capacitors - I will see, if they are reliable.

[dondrusco]

Re: ACER AL2423W - no display

I bought another one AL2423W - the same symptoms and bulged identical capacitors. I replaced all. Now it works. Excelent brightness.
But I haven't got one 100uF/25V - I replaced it with 470uF (12V branch)
Might there be any problem with it?
The monitor has only one issue - when VGA cable is connected, electronic wrongly identifies mode. Instead of 1920/1200 only 1600/1200. Probably another capacitor in electronic.
DVI is OK

[kc8adu]

Re: ACER AL2423W - no display

replace all other crap brands while you are at it.
not sure about those hitano caps.
you have proof it is worth it so order some caps from the known good list and finish the job.
panasonic fc or fm are easy to get and ideal for your app.

[PlainBill]

Re: ACER AL2423W - no display

I bought this display for 120€. It doesn't display picture, only backlight was OK.

I dismount it, and found three capacitors blown at power board - CS14, CS15, CS16.

Power board Fortron - model FSP 112-3F01

I replaced them, and now it works OK.

Now it is time to do the Badcaps Salute. Extend your right arm straight up, palm facing forward. Bend your arm at the elbow, rotating it slightly so your hand goes behind your head. Pat yourself firmly between the shoulder blades and repeat after me: "Well Done!!"

PlainBill

[dondrusco]

I bought this display for 120€. It doesn't display picture, only backlight was OK.

I dismount it, and found three capacitors blown at power board - CS14, CS15, CS16.

Power board Fortron - model FSP 112-3F01

I replaced them, and now it works OK.