From owner-freebsd-questions@freebsd.org Sat Dec 17 12:07:17 2016 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C65E6C84030 for ; Sat, 17 Dec 2016 12:07:17 +0000 (UTC) (envelope-from g8kbvdave@googlemail.com) Received: from mail-wm0-x22c.google.com (mail-wm0-x22c.google.com [IPv6:2a00:1450:400c:c09::22c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 5D22F1551 for ; Sat, 17 Dec 2016 12:07:17 +0000 (UTC) (envelope-from g8kbvdave@googlemail.com) Received: by mail-wm0-x22c.google.com with SMTP id t79so60563396wmt.0 for ; Sat, 17 Dec 2016 04:07:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20161025; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-transfer-encoding; bh=SJo/Ma2Dz4uLy6HLZge1gpn3nuKx3kFNlUQ+vTVQles=; b=Fc5qt8Y/x78zB+ULcdGjQL8eSZ8jm1rFrjUqvCBOuUa23I36v6rdSqWnvgFo5yOebX ZFTyU7KBrgpAFdVYxubjpGy1ROozKOdpiSLZ46cpQwbU5invsTweO9TctZOoV8FIY2o3 Zpe7pkRCax6MTmIBnZxgSLAwQsoXPVlk/1xyDu2EaP9A4PIvz5yJv/m4TOfJtTv+GbQQ /oiVx4t2w7hbZXZkrzJ0/2xYp2rr/URuvTiVC5L0qAJScECUjChT3Bvv1+EssY+FN6y3 qzp0tU4/kez+PnP5OaC2gZBN7dPsMuaEZVHELzFf41033jf6fAd/9nClW37Hj45J5Wd+ Ouow== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding; bh=SJo/Ma2Dz4uLy6HLZge1gpn3nuKx3kFNlUQ+vTVQles=; b=ipdX8M6lP5WSvl+teM2ZbNo3GJOcUBRQDkqmYz/N0WpzvyArAIot0oSqHjYrXVaXky 8jcU8MS1f2G7535JHsc1m1UDxMDOluK64+Kk1p44BajatP5CyRatJiM6H75QRlaizoPU 1paAz6N8CeaMKgUajun+amwQqqYKPKk9sW8+T/pV/cFL4WI0A/nmjD7PQFnpvJ7cZGVO k96so8yYaDEApHZlE2LQpW4xqhFWqqzUXl+TIXB7OLduOEdYVGbbNK6UqmpILOn02Xsf rpd9mQM8UYscmWSaPbW2IvF7bUaQjgiuWwDlTLv+rkHU4gfvkkoc8vEUeu22wI+BsoKn Pkog== X-Gm-Message-State: AIkVDXK092SOFn0msgdnr3XG3bfPG5iFFLyMh35CW9Fjnt2UJMi/2BFyqwlno3qcFequJw== X-Received: by 10.28.153.10 with SMTP id b10mr6570112wme.103.1481976435077; Sat, 17 Dec 2016 04:07:15 -0800 (PST) Received: from [192.168.1.103] ([212.225.126.106]) by smtp.gmail.com with ESMTPSA id 197sm7759735wmy.16.2016.12.17.04.07.14 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 17 Dec 2016 04:07:14 -0800 (PST) Subject: Re: freebsd-questions Digest, Vol 654, Issue 6 To: Tim Daneliuk , freebsd-questions@freebsd.org References: <23fa6b26-3e7c-cbd3-e22f-bbf45dcd4958@tundraware.com> From: Dave B Message-ID: Date: Sat, 17 Dec 2016 12:07:13 +0000 User-Agent: Mozilla/5.0 (X11; Linux i686; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: <23fa6b26-3e7c-cbd3-e22f-bbf45dcd4958@tundraware.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 17 Dec 2016 12:07:17 -0000 On 16/12/16 14:21, Tim Daneliuk wrote: > On 12/16/2016 08:14 AM, Dave B via freebsd-questions wrote: >> Check the health of the cooling systems in your notebook. > This. Like I most of us, I am the "IT Repair Department" for friends and > family. You have no idea how many computers I have "fixed" simply by > blowing the dust out of the cooling path and off the motherboards. > Mac laptops, especially, seem to be built to very tight cooling tolerances. > > Recommend taking the unit apart and then going outside to blow the dust > out of the guts of thing. Never use a vacuum cleaner to do this because - > unless specifically designed for electronics - vacuum cleaners will generate > a lot of static electricity which is deadly to solid state parts. > > Even using an air-duster-in-a-tin can create static charges. (Any air movement over a surface can.) But in practice, it's not a problem is used sensibly, within a largely complete PC, or on a laptop exposed but not dismantled main board. (individual assemblies, RAM sticks and such, then the static can do damage, but much less so, when they are installed in a socket.) More a problem, is that it is sometimes possible to blow dust into the internals of fan motors and cause problems, but even that is rare. Try not to let fan's spin too fast either. Some can generate quite a bit of voltage, and that could do something as it finds it's way back into the machine. I'm always amazed at the amount of otherwise good hardware that is chucked away, just for the want of a bit of maintenance. UPS's are a prime example, a good clean out and new batteries, and often they are as good as new. Seasons Greetings etc. Dave B.