acer 5920 g blinking power adapter

[ablacon64]

Re: acer 5920 g blinking power adapter

First, check the fuse near the battery connector. Post results.

[Lorenxo]

Re: acer 5920 g blinking power adapter

Does the LCD lamp works?
Try to press fn+F5 to switch to external monitor.

Thanks Ablacon you are the best!!!
Pressing twice fn+F5 the monitor is now alive!!


But now i have another probs. with this notebook (or mainboard)
It not charge the battery!! The battery is ok i have tried to another notebook, and the power adapter is also ok.
Have you any tips?? May be the charging circuit on the mainboard?
Can i replace somethings on the charging circuit to try to repair without replace the mainboard that for the rest is ok??

Thanks in advance

[PCBONEZ]

Re: acer 5920 g blinking power adapter

The total uF for that bank of caps is specified by Intel in their Design Guides.
Their job is to protect THE PROCESSOR from RF [aka EMI] damage.
EMI happens even when it's off.

So your traveling in your car with the laptop in the seat and the cop next to you keys up his radio to talk, or you drive past a TV or Radio station or a HAM operator's house.
The next time you start the laptop you find the CPU is dead and you dunno why.
Why is because those caps are missing and some transmitter fried your CPU.
.
And that's why you don't listen to the idiots at fixya.
.

[TBoneit]

Re: acer 5920 g blinking power adapter

Hi,

Thanks to you guys i was able to localise the bad caps PC112 PC118 and PC90 on the motherboard of my Acer 5920g.

After removing them everythings seems to work fine (Green LED on the PowerSupply doesn flash anymore and the Blue LED on the Laptop is working).


Now i want to know if i can run the laptop without those caps, or does i have to replace them before using the laptop?

On the follwing pages they are telling that the are "redundant":
http://www.fixya.com/support/t280473...or_green_light
http://www.fixya.com/support/t338288...tor_fix_doesnt
http://www.fixya.com/support/t899162...ot_power_power

Thanks in adavance for your help.

Greetings

The way I think about it quite simple. If the part isn't needed the manufacturer would have saved their money and not installed them.

[ablacon64]

Re: acer 5920 g blinking power adapter

Thanks for your reply.

The caps are marked as 10U/X6S/25V...so i guess 25V and 10uF or 100uF???

If they are marked 10U it's 10uF, all right.

[PCBONEZ]

Re: acer 5920 g blinking power adapter

Like this.
http://search.digikey.com/scripts/Dk...=490-5308-1-ND

If those are in/near CPU socket they are probably across Vcore and used to filter RF noise [higher frequencies than ripple that come from EMI sources like CRTs, WIFI, Cell phones, electric motors] out of the power to the CPU.
[Desktops have these too but few people realize it. - Some processors put them on the CPU instead of in the socket.]
There are typically something like 10-20 [+] of those in parallel.
You can verify that's what they are by finding a bunch of others in parallel with them by doing continuity checks using a DMM.
If there are a bunch of good ones in parallel then leaving a few out for a short time shouldn't hurt anything as long as you stay clear of EMI sources, but I wouldn't leave it that way permanently.
.

[Ronny_G]

Re: acer 5920 g blinking power adapter

Thanks for your reply.

The caps are marked as 10U/X6S/25V...so i guess 25V and 10uF or 100uF???

[ablacon64]

Re: acer 5920 g blinking power adapter

Those capacitors are grounded, they mostly serve as a drain or filter to the parasite electricity around processor supply circuit. Although you won't have a problem leaving without them, it's not recommended. I can't remember right now but I guess they are 100uF 25v. Need to confirm.

[PCBONEZ]

Re: acer 5920 g blinking power adapter

I wouldn't turn it on with missing parts unless you've traced the whole circuit and know it's okay.

If you are in the US check digikey.com and mouser.com.

[Ronny_G]

Re: acer 5920 g blinking power adapter

Ok.... thanks for your warning!

I found those old articles from google...

Those articles just helped to localise the badcaps....

Can i test the laptop without those smd caps PC112 PC118 and PC90.

Or does i have to replace them? What about the values? I seems that my local dealer dont has exactly the same caps!

Thanks again in advance for your help!

[PCBONEZ]

Re: acer 5920 g blinking power adapter

Don't take advice from fixya.

[Ronny_G]

Re: acer 5920 g blinking power adapter

Hi,

Thanks to you guys i was able to localise the bad caps PC112 PC118 and PC90 on the motherboard of my Acer 5920g.

After removing them everythings seems to work fine (Green LED on the PowerSupply doesn flash anymore and the Blue LED on the Laptop is working).


Now i want to know if i can run the laptop without those caps, or does i have to replace them before using the laptop?

On the follwing pages they are telling that the are "redundant":
http://www.fixya.com/support/t280473...or_green_light
http://www.fixya.com/support/t338288...tor_fix_doesnt
http://www.fixya.com/support/t899162...ot_power_power

Thanks in adavance for your help.

Greetings

[ablacon64]

Re: acer 5920 g blinking power adapter

Does the LCD lamp works?
Try to press fn+F5 to switch to external monitor.

[Lorenxo]

Re: acer 5920 g blinking power adapter

The fax modem.

Put it in place if it's not or replace it.

You are great!!! I solved my issue.
But now i have another prob. with another 5920g and because you are so
qualified i would ask you some tips.
The problem is that notebook seems to start normally but nothing is displayed on video. (but i can ear windows welcome sound and i can connect to the notebook with remote desktop). I also tried to change video cards but nothing (the same video cards work on another 5920g). I also tried to connect external monitor but nothing no image come out.
Can you give me some help?

[ablacon64]

Re: acer 5920 g blinking power adapter

You're welcome. Sometimes PC90 and PC96 fail too, just got one this week.

[skywalker]

Re: acer 5920 g blinking power adapter

Check capacitors PC112 and PC118 near the memory slots. One of them (or both) may be shorted. Very common on that model.

Thank you very much for the info pc118 was at fault.

[incradibles]

Acer Aspire 5732Z dead

Hi
Please help me out i have acer aspire 5732z its dead power jack is ok,

[ablacon64]

Re: acer 5920 g blinking power adapter

That's the way this machine was designed. It's so common that I had no doubt when told about the delay problem. We're Acer ASP in Brazil. Not an ordinary ASP, we refurbish Acer motherboards.

[Wizard]

Re: acer 5920 g blinking power adapter

That does not makes sense for modem module, many notebooks have it optioned in or out but this Acer, I don't like that when it fusses about that. I usually take modem out to save on complexies and slightly save on power.

Cheers, Wizard

[ablacon64]

Re: acer 5920 g blinking power adapter

Glad I could help.