Groups > alt.comp.hardware > #20671

Re: Computer turns on and then just dies

From	"s\|b" <me@privacy.invalid>
Newsgroups	alt.comp.hardware, alt.comp.hardware.pc-homebuilt
Subject	Re: Computer turns on and then just dies
Date	2024-11-26 18:44 +0100
Organization	XXII
Message-ID	<lqmfomF50lhU1@mid.individual.net> (permalink)
References	(3 earlier) <vhsgi8$1mso2$1@dont-email.me> <lqh1jaF8n4tU2@mid.individual.net> <vi01sp$2ckbh$1@dont-email.me> <lqje4oFkfg9U1@mid.individual.net> <vi2tv2$321ei$1@dont-email.me>

Cross-posted to 2 groups.

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On Mon, 25 Nov 2024 17:33:05 -0500, Paul wrote:


> > I'm making a note of that. I bought the PC in 2012, so there's a good
> > chance it's the CPU and not the PSU that causes the shutdown?

> Unlikely.

)-:
 
> If a heatsink falls off the CPU, the temperature shoots up to 200C,
> the thermal protection does not engage immediately, that
> could damage a CPU.
> 
> But really, with the heatsink fastened to the top, there is
> thermal inertia (mass) and the temperature does not shoot up
> quite as rapidly.

That's disappointing, sort of. But I do get to play with the paste.
 
> It's more likely a capacitor is leaking near the CPU socket,
> if the board won't start.

Well then it's removing the hard drives and dump the tower at a recycle
point! If I'll bring it to a computer repair store they will charge me
an arm and a leg.
 
> But your case, your initial symptoms were an overloaded +5VSB.
> I suggested measuring the current, as one way to ascertain
> if there is a specific problem with the combination of
> components. If something is shorted on the motherboard,
> then the problem (box shuts off), may still be present
> with your spare supply installed. You would put in the
> spare supply. The LED would be lit for a minute or two,
> then go off on its own. That could be an overload of +5VSB
> for example.

I'm learning new things here. It's my brother who knows electricity; I'm
100% sure he's got the equipment to measure.

I checked the PSU that I hopefully can use:

AOpen
Model no: Z400-08FC (400W peak)
 
> Modern motherboards (yours is modern enough), have THERMTRIP.
> If the CPU goes over 100C to 120C or so, THERMTRIP causes
> PSON# to be deasserted and the PC fans stop spinning, and
> 3.3V/5V/12V are then powered off. You can have a shutdown
> due to a thermal issue. The Asus LED remains lit when that happens
> (a THERMTRIP).
> 
> But the thing is, you told us that the Asus LED, which
> monitors +5VSB, that went OFF. That's an indication of
> a power supply problem, not a THERMTRIP. THERMTRIP will
> not turn that LED off.

OK, tnx. Does this also fit in the fact that I sometimes get to the BIOS
(however briefly it is) ?
 
> The LED then, is key to determining whether you have
> a "NEW" or "DIFFERENT" problem than the first one reported.
> 
> 1) Swap out power supply. Put in known-good supply.
> 2) Record symptoms again. Does PC shut off as before ?
>    Does the Asus LED stay lit after the erroneous shutdown ?
> 
> Report back.

Will do when you confirm I can use the other PSU. It's ATX, so I'm
guessing yes?

-- 
s|b

Thread

Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-21 16:19 +0100
  Re: Computer turns on and then just dies Marco Moock <mm+solani@dorfdsl.de> - 2024-11-21 16:28 +0100
    Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-21 17:07 +0100
      Re: Computer turns on and then just dies "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2024-11-22 00:18 +0800
        Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-21 17:57 +0100
          Re: Computer turns on and then just dies "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2024-11-22 11:42 +0800
            Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-22 19:47 +0100
              Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-22 20:34 -0500
          Re: Computer turns on and then just dies "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2024-11-22 11:47 +0800
            Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-22 19:48 +0100
              Re: Computer turns on and then just dies "Mr. Man-wai Chang" <toylet.toylet@gmail.com> - 2024-11-23 12:12 +0800
          Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-23 15:18 -0600
  Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-21 16:35 +0100
    Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-21 12:43 -0600
      Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-22 19:56 +0100
        Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-22 17:32 -0600
  Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-21 12:22 -0600
    Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-22 20:01 +0100
      Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-22 18:03 -0600
  Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-21 15:58 -0500
    Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-21 23:28 -0600
      Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-22 07:24 -0500
        Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-22 10:20 -0600
    Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-23 12:09 +0100
      Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-23 07:07 -0500
        Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-24 17:12 +0100
          Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-24 15:21 -0500
            Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-25 14:58 +0100
              Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-25 17:33 -0500
                Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-26 18:44 +0100
                Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-26 16:31 -0600
                Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-27 15:38 +0100
                Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-26 21:04 -0500
                Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-27 16:01 +0100
                Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-27 10:19 -0500
      Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-23 14:28 -0600
        Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-24 17:10 +0100
          Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-24 15:27 -0500
            Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-25 15:08 +0100
        Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-25 14:38 +0100
          Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-26 16:37 -0600
            Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-27 16:05 +0100
  Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-24 16:51 +0100
    Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-24 16:03 -0500
      Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-25 15:03 +0100
        Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-25 18:09 -0500
          Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-30 12:28 +0100
    Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-27 15:45 +0100
  Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-28 17:17 +0100
    Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-28 11:07 -0600
      Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-28 19:30 -0500
        Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-28 19:34 -0600
          Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-29 05:21 -0500
            Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-29 11:35 -0600
        Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-29 13:49 +0100
          Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-29 17:11 +0100
            Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-29 15:01 -0500
              Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-29 21:46 -0600
              Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-30 12:21 +0100
                Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-30 09:15 -0600
                Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-30 17:16 +0100
                Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-30 17:40 -0500
                Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-12-02 11:43 +0100
                Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-12-02 14:15 -0600
                Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-12-02 21:19 +0100
                Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-12-01 08:26 -0600
                Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-12-01 13:23 -0500
                Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-12-02 11:40 +0100
                Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-12-02 14:06 -0600
                Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-12-02 21:30 +0100
                Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-11-30 11:31 -0500
                Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-11-30 12:22 -0600
      Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-11-29 12:46 +0100
  Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-12-04 17:41 +0100
    Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-12-04 14:14 -0600
      Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-12-04 18:28 -0500
        Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-12-05 09:30 -0600
          Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-12-05 11:11 -0500
      Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-12-06 17:43 +0100
        Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-12-06 17:45 +0100
          Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-12-06 16:46 -0600
            Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-12-07 14:11 +0100
              Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-12-07 09:46 -0600
                Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-12-07 17:02 +0100
                Re: Computer turns on and then just dies VanguardLH <V@nguard.LH> - 2024-12-07 11:40 -0600
                Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-12-09 15:54 +0100
        Re: Computer turns on and then just dies Paul <nospam@needed.invalid> - 2024-12-06 20:43 -0500
          Re: Computer turns on and then just dies "s|b" <me@privacy.invalid> - 2024-12-07 15:27 +0100

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