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Groups > comp.sys.laptops > #2346

Re: cannot power "on" ASUS laptop after power outage

From Paul <nospam@needed.com>
Newsgroups alt.comp.periphs.mainboard.asus, alt.os.linux.ubuntu, comp.sys.laptops
Subject Re: cannot power "on" ASUS laptop after power outage
Date 2015-10-16 09:23 -0400
Organization A noiseless patient Spider
Message-ID <mvqtk5$9uj$1@dont-email.me> (permalink)
References <mvorha$mpr$1@news.albasani.net>

Cross-posted to 3 groups.

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Adam wrote:
> System:    ASUS N61JQ (laptop)
> Host OS:    Ubuntu 12.04 LTS
> 
> 
> After a power outage yesterday, pressing the power button of
> ASUS laptop does nothing.  The laptop was/is connected to
> an APC battery backup (surge protection only) outlet (via AC adapter).
> AC adapter's green light is "on".
> 
> Any ideas?
> 
> 

The attachments in this thread may help.

"ASUS N61JQ won't start"
http://www.badcaps.net/forum/showthread.php?t=42461

You need an account to access the attachments. The
mainboard schematic is for a member of the same family,
but might not be exactly the same as your mainboard.
(The circuit may use different component values for
65W versus 90W designs.)

The first MOSFET (one circled on a schematic page),
is an inrush limiter. If the AC adapter is "hot" and then
plugged into the barrel connector, a lot of current
would flow for a short period of time. Instead, the
inrush limiter gradually turns on the power, using an RC
circuit tied to the gate. And the inrush limiter
prevents the overcurrent inside the AC adapter
from getting tripped.

I don't see a fuse in that schematic. It's possible
if a fuse is present, it sits in front of a clamp diode.
If, somehow, reverse bias is applied to the barrel
of the power connector, the clamp diode starts to
conduct (protecting the motherboard). The fuse would be
there, so the clamp diode doesn't burn out. Otherwise,
the AC adapter has its own current limiting inside
the adapter, so doesn't really need a fuse at the
motherboard level.

What I learned from that thread, is "look for burned stuff" :-)
That's better than trying to decode that schematic...

    Paul

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Thread

cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-15 11:33 -0700
  Re: cannot power "on" ASUS laptop after power outage Mike Easter <MikeE@ster.invalid> - 2015-10-15 11:40 -0700
    Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-15 11:56 -0700
      Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-15 12:21 -0700
        Re: cannot power "on" ASUS laptop after power outage "Jonathan N. Little" <lws4art@gmail.com> - 2015-10-15 15:29 -0400
          Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-15 12:36 -0700
  Re: cannot power "on" ASUS laptop after power outage Bob_Villa <pheeh.zero@gmail.com> - 2015-10-15 11:42 -0700
    Re: cannot power "on" ASUS laptop after power outage Bob_Villa <pheeh.zero@gmail.com> - 2015-10-15 11:43 -0700
      Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-15 11:59 -0700
  Re: cannot power "on" ASUS laptop after power outage Johnny <johnny@invalid.net> - 2015-10-15 14:41 -0500
    Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-15 12:56 -0700
      Re: cannot power "on" ASUS laptop after power outage "Jonathan N. Little" <lws4art@gmail.com> - 2015-10-15 16:08 -0400
        Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-15 13:42 -0700
      Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-15 13:21 -0700
  Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-16 08:11 -0400
    Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-16 20:13 -0700
      Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-16 21:05 -0700
        Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-17 01:07 -0400
      Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-17 01:00 -0400
        Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-16 23:03 -0700
          Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-17 08:19 -0400
            Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-17 12:04 -0700
              Re: cannot power "on" ASUS laptop after power outage not@telling.you.invalid (Computer Nerd Kev) - 2015-10-18 02:56 +0000
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-17 23:22 -0400
                Re: cannot power "on" ASUS laptop after power outage not@telling.you.invalid (Computer Nerd Kev) - 2015-10-18 03:40 +0000
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-17 23:50 -0400
                Re: cannot power "on" ASUS laptop after power outage not@telling.you.invalid (Computer Nerd Kev) - 2015-10-18 03:59 +0000
                Re: cannot power "on" ASUS laptop after power outage Onion Knight <onionknight@linuxmail.org> - 2015-10-18 11:14 -0400
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-18 11:17 -0400
                Re: cannot power "on" ASUS laptop after power outage Godzilla <godzilla@lizardboss.invalid> - 2015-10-18 15:24 +0000
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-18 17:06 -0400
                Re: cannot power "on" ASUS laptop after power outage Godzilla <godzilla@lizardboss.invalid> - 2015-10-18 22:22 +0000
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-18 11:18 -0400
                Re: cannot power "on" ASUS laptop after power outage not@telling.you.invalid (Computer Nerd Kev) - 2015-10-18 21:01 +0000
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-18 17:10 -0400
                Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-18 13:58 -0700
      Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-17 01:03 -0400
      Re: cannot power "on" ASUS laptop after power outage Caver1 <caver1@inthemud.org> - 2015-10-17 09:48 -0400
        Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-17 10:01 -0400
          Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-20 07:50 -0700
            Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-20 12:21 -0400
              Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-20 11:17 -0700
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-20 14:33 -0400
                Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-20 11:54 -0700
              Re: cannot power "on" ASUS laptop after power outage mike <ham789@netzero.net> - 2015-10-20 12:54 -0700
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-20 16:00 -0400
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-20 16:01 -0400
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-20 16:03 -0400
                Re: cannot power "on" ASUS laptop after power outage mike <ham789@netzero.net> - 2015-10-20 14:32 -0700
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-20 19:51 -0400
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-20 16:04 -0400
                Re: cannot power "on" ASUS laptop after power outage Paul <nospam@needed.com> - 2015-10-20 19:29 -0400
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-20 20:03 -0400
                Re: cannot power "on" ASUS laptop after power outage mike <ham789@netzero.net> - 2015-10-21 00:10 -0700
                Re: cannot power "on" ASUS laptop after power outage Paul <nospam@needed.com> - 2015-10-21 03:31 -0400
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-21 08:40 -0400
                Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-21 14:22 -0700
                Re: cannot power "on" ASUS laptop after power outage Paul <nospam@needed.com> - 2015-10-21 18:32 -0400
                Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-21 18:43 -0700
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-21 08:30 -0400
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-21 08:30 -0400
        Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-17 09:07 -0700
          Re: cannot power "on" ASUS laptop after power outage Mike Easter <MikeE@ster.invalid> - 2015-10-17 10:22 -0700
            Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-17 11:39 -0700
              Re: cannot power "on" ASUS laptop after power outage Mike Easter <MikeE@ster.invalid> - 2015-10-17 12:21 -0700
                Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-17 12:36 -0700
                Re: cannot power "on" ASUS laptop after power outage "Cybe R. Wizard" <cybe_r_wizard@WizardsTower.invalid> - 2015-10-17 20:43 -0500
  Re: cannot power "on" ASUS laptop after power outage Paul <nospam@needed.com> - 2015-10-16 09:23 -0400
    Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-16 09:37 -0700
      Re: cannot power "on" ASUS laptop after power outage Marek Novotny <marek.novotny@marspolar.com> - 2015-10-16 09:39 -0700
        Re: cannot power "on" ASUS laptop after power outage "Adam" <adam@no_thanks.com> - 2015-10-16 10:19 -0700
        Re: cannot power "on" ASUS laptop after power outage "Cybe R. Wizard" <cybe_r_wizard@WizardsTower.invalid> - 2015-10-16 14:47 -0500
          Re: cannot power "on" ASUS laptop after power outage not@telling.you.invalid (Computer Nerd Kev) - 2015-10-16 23:18 +0000
            Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-16 20:17 -0400
              Re: cannot power "on" ASUS laptop after power outage not@telling.you.invalid (Computer Nerd Kev) - 2015-10-18 02:29 +0000
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-17 23:07 -0400
                Re: cannot power "on" ASUS laptop after power outage not@telling.you.invalid (Computer Nerd Kev) - 2015-10-18 03:42 +0000
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-17 23:52 -0400
                Re: cannot power "on" ASUS laptop after power outage not@telling.you.invalid (Computer Nerd Kev) - 2015-10-18 04:02 +0000
            Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-16 20:18 -0400
              Re: cannot power "on" ASUS laptop after power outage not@telling.you.invalid (Computer Nerd Kev) - 2015-10-18 02:32 +0000
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-17 23:09 -0400
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-17 23:11 -0400
                Re: cannot power "on" ASUS laptop after power outage not@telling.you.invalid (Computer Nerd Kev) - 2015-10-18 03:53 +0000
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-17 23:56 -0400
                Re: cannot power "on" ASUS laptop after power outage not@telling.you.invalid (Computer Nerd Kev) - 2015-10-18 04:06 +0000
                Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-18 00:58 -0400
          Re: cannot power "on" ASUS laptop after power outage crankypuss <invalid@invalid.invalid> - 2015-10-17 04:01 -0600
  Re: cannot power "on" ASUS laptop after power outage Big Bad Bob <BigBadBob-at-mrp3-dot-com@testing.local> - 2015-10-20 11:01 -0700
    Re: cannot power "on" ASUS laptop after power outage DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-10-20 14:31 -0400

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