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Date:      Sat, 17 Dec 2016 10:19:17 -0700 (MST)
From:      Dale Scott <dalescott@shaw.ca>
To:        Dave B <g8kbvdave@googlemail.com>
Cc:        Tim Daneliuk <tundra@tundraware.com>, freebsd-questions@freebsd.org
Subject:   Re: freebsd-questions Digest, Vol 654, Issue 6
Message-ID:  <A63B3E19-31B0-4398-9B43-FE92956D7ABC@shaw.ca>
In-Reply-To: <cc74803f-a1ad-5463-0d4e-60e5bc2e7e53@googlemail.com>
References:  <mailman.84.1481889602.60451.freebsd-questions@freebsd.org> <c711ffe0-b862-4cf4-be9b-d8a6e6e4540f@googlemail.com> <23fa6b26-3e7c-cbd3-e22f-bbf45dcd4958@tundraware.com> <cc74803f-a1ad-5463-0d4e-60e5bc2e7e53@googlemail.com>

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Blow canned air into a hot paper shredder and you'll get some real excitemen=
t! (Kaboom!). That's when I read the can and learned it's not really air.=20=



> On Dec 17, 2016, at 5:07 AM, Dave B via freebsd-questions <freebsd-questio=
ns@freebsd.org> wrote:
>=20
>> 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 tolerance=
s.
>>=20
>> 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 gener=
ate
>> a lot of static electricity which is deadly to solid state parts.
>>=20
>>=20
> 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.)
>=20
> 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.
>=20
> 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.
>=20
> Seasons Greetings etc.
>=20
> Dave B.
>=20
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