From owner-freebsd-stable@FreeBSD.ORG Mon Feb 2 12:40:05 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8D95E1065670 for ; Mon, 2 Feb 2009 12:40:05 +0000 (UTC) (envelope-from matthias.andree@gmx.de) Received: from mail.gmx.net (mail.gmx.net [213.165.64.20]) by mx1.freebsd.org (Postfix) with SMTP id C5AC78FC1C for ; Mon, 2 Feb 2009 12:40:03 +0000 (UTC) (envelope-from matthias.andree@gmx.de) Received: (qmail invoked by alias); 02 Feb 2009 12:40:00 -0000 Received: from balu.cs.uni-paderborn.de (EHLO balu.cs.uni-paderborn.de) [131.234.21.37] by mail.gmx.net (mp009) with SMTP; 02 Feb 2009 13:40:00 +0100 X-Authenticated: #428038 X-Provags-ID: V01U2FsdGVkX18Y8g82/9UYyhjQziruPzaYF5B/lu5V3X8LacJFNm 8eTmTSxj5eig9g Received: from localhost ([127.0.0.1]) by balu.cs.uni-paderborn.de with esmtp (Exim 4.69) (envelope-from ) id KEFV6H-000BN0-90; Mon, 02 Feb 2009 13:39:53 +0100 Message-ID: <4986E998.4040504@gmx.de> Date: Mon, 02 Feb 2009 13:39:52 +0100 From: Matthias Andree User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.8.1.19) Gecko/20081209 Thunderbird/2.0.0.19 Mnenhy/0.7.5.666 MIME-Version: 1.0 To: Andriy Gapon References: <497AF4C7.3080309@icyb.net.ua> <49804F0C.3000400@icyb.net.ua> <4980B072.3050205@modulus.org> <4986DAAA.3090208@icyb.net.ua> In-Reply-To: <4986DAAA.3090208@icyb.net.ua> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Y-GMX-Trusted: 0 X-FuHaFi: 0.68 Cc: freebsd-stable@freebsd.org, Andrew Snow Subject: Re: problem with "cold" hardware? [Was: panic in callout_reset: bad link in callwheel] X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 Feb 2009 12:40:06 -0000 Andriy Gapon schrieb: > on 28/01/2009 21:22 Andrew Snow said the following: > >> Andriy Gapon wrote: >> >>> Previously I heard about problems with hardware running hot, but not >>> with it being "cold". I put the word in quotes, because the system is in >>> a room with normal room temperature. >>> >>> Any guesses what hardware part might be acting up like this? >>> >> Power supply. Give all the capacitors a visual check. Or you may be >> drawing too much power from your rated supply. >> > > Right on the target. I opened the PSU after replacing it, visually it > looks OK (too me), nevertheless I have verified that the fault was in it. > > Thank you and everybody who helped! > Electronic devices, including computers, that become unable to /cold/ boot (and need a reset some seconds or minutes after power-up) usually suffer from dry or leaked capacitors, either in the PSU or - I've seen that more often - the voltage regulator on the main board. Dry capacitors often look innocuous, unlike leaked ones that show brownish stains (electrolytes) on the cap or underneath.