The infamous 2 seconds to black

[shimjocky]

Re: The infamous 2 seconds to black

Leave the big boy alone. They rarely fail, or so I've heard.

Thanks, will do.
How bout the FC series for power supplies, any good? I know this site recommends them for mobo's.

[EGuevarae]

Re: The infamous 2 seconds to black

That just leaves the big cap. Do I need to worry about that one? If so how the heck do you break it loose from all the goo? I was just trying and it felt like I was gonna break the board.

Leave the big boy alone. They rarely fail, or so I've heard.

[shimjocky]

Re: The infamous 2 seconds to black

Decided to try and figure out some replacements on my own. Here is what I am thinking so far. Please feel free to step in if you feel I have made an error in my choices. These are all Panasonic FC Series caps.

Capxon 25V 220uF KF105C C717
AND
Capxon 25V 220uF KF105C C718
Replacement
Panasonic EEUFC1E221
http://search.digikey.com/scripts/Dk...name=P10271-ND



Taicon 25V 680uF 0715(M) 105C(HH)P
Replacement
Panasonic EEUFC1E681
http://search.digikey.com/scripts/Dk...name=P10277-ND



Taicon 10V 1000uF 0715(M) 105C(HW)P
Replacement
Panasonic EEUFC1A102
http://search.digikey.com/scripts/Dk...name=P10225-ND


Taicon 50V 22uF 0715(M) 105C(HW)P
Replacement
Panasonic EEUFC1H220
http://search.digikey.com/scripts/Dk...name=P10318-ND

That just leaves the big cap. Do I need to worry about that one? If so how the heck do you break it loose from all the goo? I was just trying and it felt like I was gonna break the board.

[shimjocky]

Re: The infamous 2 seconds to black

I think I will recap the whole psu at this point as it seems worth a try given the fairly low cost of doing so. If someone wouldn't mind recommending top shelf replacements for my caps I would be very grateful.

[Bobdee]

Re: The infamous 2 seconds to black

Also check out those 2 black rectangle box shape things, next to that cap you arrowed off, they look like fuses to me

[shimjocky]

Re: The infamous 2 seconds to black

Thanks for the reply.

I have only looked at it during the post screen but I saw no strange colors. You see the acer logo then the actual post screen for about a second then it shuts down.

I just took another look at the caps and I am pretty sure I gave everything there was to be had.

I don't think I recall hearing anything strange when it shuts down

I added a crappy little arrow to point to the cap that I had said I thought was bulging. Kinda hard to tell in the pic, maybe due to the flash.

[EGuevarae]

Re: The infamous 2 seconds to black

Ok, now for the info on the caps. Damn those things can be hard to read!

Capxon 25V 220uF KF105C C717

Capxon 25V 220uF KF105C C718

Taicon 25V 680uF 0715(M) 105C(HH)P

Taicon 10V 1000uF 0715(M) 105C(HW)P

Taicon 50V 22uF 0715(M) 105C(HW)P

Change the 25v 680uf and 220uf - in fact all, but those first. They look OK with the naked eye, but sometimes they fail without visual indication.
Also, I have some questions:

• When the lamps turn on, did you notice a reddish/pink hue in the light, or they light OK but shut down seconds after? You may have bad lamps on that one.
• The 50v 22uf is near the transformer? you didn't put the C### marking like in the first two.
• Do you notice any sound when the lamps go off?

With the specs you specified, in no time someone will be telling you the recommended replacement caps.Just wait, and see ...

[shimjocky]

Re: The infamous 2 seconds to black

Ok, now for the info on the caps. Damn those things can be hard to read!

one Capxon 25V 220uF KF105C C717

one Capxon 25V 220uF KF105C C718

two Taicon 25V 680uF 0715(M) 105C(HH)P

two Taicon 10V 1000uF 0715(M) 105C(HW)P

one Taicon 50V 22uF 0715(M) 105C(HW)P

P.S. Not sure of the values on the big cap as they are obscured by the goo.

[shimjocky]

Re: The infamous 2 seconds to black

Here are the pics I just took. Will follow up with info from the caps. Sorry in advance to anyone with a smaller res but I am not sure how to thumbnail these darn photobucket images and your attachment manager is throwing db errors so I couldn't do it that way.

[EGuevarae]

Re: The infamous 2 seconds to black

Pics help, but if you put something like "I have 2 SamXon GL 2200uf 25v 105c on...."..." and 2 CapXon" well....., you get the idea. Brand,series, capacitance and V rating.
And yes, those fat caps can cause that, but you couldn't tell for sure until you change these (and maybe others, that's why the data or the pictures help).
And welcome to the forums.

[NxB]

Re: The infamous 2 seconds to black

Just replace the caps and see. They could look fine and still be bad. Unless you have an ESR meter you won't know.

[shimjocky]

Just found this site yesterday. I think its great that you have a community willing to help noobies like myself who are just handy enough to be dangerous and not smart enough to walk away.

I have an Acer AL2223W. It has the symptom of blacking out seconds after being turned on. I have been wanting to learn to work on these things so I decided to tear into it.

After doing some reading here I decided to do what I could to troubleshoot the power supply. I was able to bench test it and with my multimeter I found that it was putting out the proper +12V and +5.2V. I then rigged it into my psu tester to try and put it under a load. What I found was that when I did this the +12V dropped to about 10.7V while the 5.2 stayed strong.

Two of the caps on the board look like they are trying to bulge. They are the type with a + scribed in the top. The quadrants of the + have bulged up a bit I think but not like I expected to find. These caps are very close to the output of the power supply.

Could the voltage drop under load possibly be why this monitor fires up then fails?

I wish I could take a pic but I am waiting for my batts for the camera to charge. Will follow up with a pic if needed.

Thanks for any help you can offer and thanks again for running such a great site.