Dust filled computer

R

Rob

Opened up a friends computer and it is very badly covered in dust. Managed
to get most out, but the video and audio cards are very dirty - the printed
circuit board side is covered in dust - would it be safe to remove them and
then use a household vacuum cleaner to clean the dirt off.

Thanks

Rob
 
B

Bob Day

Rob said:
Opened up a friends computer and it is very badly covered in dust. Managed
to get most out, but the video and audio cards are very dirty - the printed
circuit board side is covered in dust - would it be safe to remove them and
then use a household vacuum cleaner to clean the dirt off.

Absolutely not. Use of a vacuum cleaner can cause static discharges
that will damage the components of a computer. Get some "dust
remover spray" or "canned air" from, for example, RadioShack,
Best Buy, or Circuit City and a dust mask. Then take the computer
outside and spray out the dust. Keep the end of the spray straw at
least six inches from any components and keep it moving so as
to avoid excessive thermal shock to the components.

-- Bob Day
http://bobday.vze.com
 
D

Dave C.

Rob said:
Opened up a friends computer and it is very badly covered in dust. Managed
to get most out, but the video and audio cards are very dirty - the
printed
circuit board side is covered in dust - would it be safe to remove them
and
then use a household vacuum cleaner to clean the dirt off.

Thanks

Rob


NOOOOOOOO!!!!!!!!!!!!!!!

NEVER use a vacuum cleaner to clean any electronic equipment, especially
computer equipment. The vacuum cleaner is a very efficient static
electricity generator. Note I said "generator" as opposed to just
"collector". Use air dusters sold at any office supply store. If that is
not enough, use q-tips and rubbing alcohol. If the space to clean is too
large for q-tip, I suppose cotton balls would be just as good.
 
K

Key-Bored

Rob said:
Opened up a friends computer and it is very badly covered in dust. Managed
to get most out, but the video and audio cards are very dirty - the
printed
circuit board side is covered in dust - would it be safe to remove them
and
then use a household vacuum cleaner to clean the dirt off.

Thanks

Rob


Maybe one of those nifty Swiffer Dusters?
 
P

Phisherman

Opened up a friends computer and it is very badly covered in dust. Managed
to get most out, but the video and audio cards are very dirty - the printed
circuit board side is covered in dust - would it be safe to remove them and
then use a household vacuum cleaner to clean the dirt off.

Thanks

Rob


Get a can of computer compressed air. It is sold in a can. Big Lots
or WalMart. It is best not to touch the boards.
 
A

Al Smith

Opened up a friends computer and it is very badly covered in dust. Managed
Maybe one of those nifty Swiffer Dusters?

What I always do is take the wide nozzle off the household vac and
use the bare hose to suck up anything in the case that isn't
nailed down. Does a pretty good job, if you bring it close enough
to the motherboard. But I guess others are saying that isn't the
best approach due to the chance for static discharge. Here's a
thought -- use the vacuum on a rainy day, when the humidity in the
air is up the wazoo. Good luck getting static sparks on those days.
 
R

Rob

Rob said:
Opened up a friends computer and it is very badly covered in dust. Managed
to get most out, but the video and audio cards are very dirty - the printed
circuit board side is covered in dust - would it be safe to remove them and
then use a household vacuum cleaner to clean the dirt off.

Thanks

Rob

Thanks for the advice. I used the air can after brushing the worst off .
Worked well.
 
M

Mac Cool

Rob:
Opened up a friends computer and it is very badly covered in dust.
Managed to get most out, but the video and audio cards are very dirty
- the printed circuit board side is covered in dust

Use a brush or canned air. I will tell you something that will probably
start a riot, but motherboards, video and audio cards are waterproof and
you can wash the components in soapy water, rinse well in warm water and
allow them to dry thoroughly before reinstalling. I would use compressed
air on any recesses like ports, sockets, etc.

Hopefully I don't need to mention that the system should be disambled and
unplugged.
 
J

JAD

used your suggestion and just through the rig in the washer....gentle cycle
of course....was pondering when I should throw in the fabric softener.....OH
SHIT!!! the spin cycle...........later
 
A

Al Dykes

Rob:


Use a brush or canned air. I will tell you something that will probably
start a riot, but motherboards, video and audio cards are waterproof and
you can wash the components in soapy water, rinse well in warm water and
allow them to dry thoroughly before reinstalling. I would use compressed
air on any recesses like ports, sockets, etc.


Yup. Over the last 20 years circuit board manufacturers have switched
from nasty solvents to pure water to clean the residue of
manufacturing. It's followed by blasts of hot air.

FIrst hand experience; I did disaster recovery planning for the
computer facilities for a big bank. Once I got to supervise the
cleanup of an office that was on the floor above a serious fire. Our
floor was soot-saturated. I called in a crew from a company that
specializes in computer cleanup. They came with a van loaded with
cleanup supplies. Here's what they did;

- They assembled a walk-in wet room with 2x4s and big plastic tarps.
- They had 5 Gal jugs of pure, de-ionized water and a mediuum pressure
preasure washer
- Outside the wet room they had a commercial sized kitchen
convection oven. You could cook 2 turkeys in it.

They disassembled everything to the circuit board level, washed each
board off, and then popped it in the on low heat-high airflow for a
couple minutes.

We did this for several PC servers and lots of PCs. It took a week
of long days.
 
P

P T

Everyone says vacuums are a no-no.

I was one of those annoying children who say, "Why? . . . Why? . . .
Why?"

It seems like it's just sucking in air, creating a wind. Why does it
create static? Why doesn't the wind off a compressed air can do the
same?

Why?
Pete
 
D

David Maynard

Al said:
Yup. Over the last 20 years circuit board manufacturers have switched
from nasty solvents to pure water to clean the residue of
manufacturing. It's followed by blasts of hot air.

FIrst hand experience; I did disaster recovery planning for the
computer facilities for a big bank. Once I got to supervise the
cleanup of an office that was on the floor above a serious fire. Our
floor was soot-saturated. I called in a crew from a company that
specializes in computer cleanup. They came with a van loaded with
cleanup supplies. Here's what they did;

- They assembled a walk-in wet room with 2x4s and big plastic tarps.
- They had 5 Gal jugs of pure, de-ionized water and a mediuum pressure
preasure washer
- Outside the wet room they had a commercial sized kitchen
convection oven. You could cook 2 turkeys in it.

They disassembled everything to the circuit board level, washed each
board off, and then popped it in the on low heat-high airflow for a
couple minutes.

We did this for several PC servers and lots of PCs. It took a week
of long days.

Yes. However, controlled cleaning with de-ionized water and forced
convection bake ovens is a different matter than simply saying PCBs are
'waterproof' so break out the tap water and soap suds, rinse, and dry.

Water doesn't instantly destroy a typical PC circuit board but they are not
'waterproof'.
 
A

Al Smith

Everyone says vacuums are a no-no.
I was one of those annoying children who say, "Why? . . . Why? . . .
Why?"

It seems like it's just sucking in air, creating a wind. Why does it
create static? Why doesn't the wind off a compressed air can do the
same?

Why?
Pete

Interesting point. Maybe because the compressed air is free to
expand from the can in all directions, whereas the air sucked into
the vacuum is funneled through a hose? Just thinking aloud. I know
that when I touch the outside of a vacuum cleaner, I can often
feel static in the hairs on the back of my hand, but whether there
is static generated by the air coming into the nozzle, on the
surface over which the air passes, I don't know.
 
D

David Besack

Use a brush or canned air. I will tell you something that will probably
Yup. Over the last 20 years circuit board manufacturers have switched
from nasty solvents to pure water to clean the residue of
manufacturing. It's followed by blasts of hot air.

I can confirm this.

In college I had a part time job putting motherboards together for a
small company that did assembly work for some of the bigger
manufacturers. My job was basically to take racks of assembled boards
and run them through a machine thatsoldered the whole underside of the
board at once. However, there was some solvent used that needed to be
washed off soon after soldering. We put them into a coveyor belt
washing system that included jet sprays of very hot water and then
blow-drying. After that they were shipped out.

One thing I will recommend if you do this: shake it dry then dab it with
a cloth, then use a can of air to get the little bits of water out, and
THEN let it sit at least overnight. Maybe come back and do another
air-spraying just to be sure, and check every inch before you start
putting things back together.
 
D

David Besack

It seems like it's just sucking in air, creating a wind. Why does it
create static? Why doesn't the wind off a compressed air can do the
same?

A vacuum has an electric-powered motor in it.
 
H

hidehi

Yup. Over the last 20 years circuit board manufacturers have switched
from nasty solvents to pure water to clean the residue of
manufacturing. It's followed by blasts of hot air.

Funny that more people here didn't know that. I guess the outsourcing
of PCBA's by most companies makes it an out of sight, out of mind
thing.

I seem to recall some bargain outfits actually used cheap dishwashers.

Not that the old vapor degreasers at cheap shops were so wonderful ;)

I saw a vapor degreaser in TJ that was so contaminated by use without
replenishment, that a certain brand of resistor was losing physical
integrity (melting) on the boards. Left a little green blob of mush
with two leads sticking out.
 
S

spodosaurus

JAD said:
use a camel hair paint brush

Yep. Unless there are nooks and crannies that are really full of dust
and can't be reached, then put canned air carefully to the task. I've
also used a non-static photographic type brush for this sort of thing.


--
spammage trappage: replace fishies_ with yahoo

I'm going to die rather sooner than I'd like. I tried to protect my
neighbours from crime, and became the victim of it. To jump to the end
of the story, as a result of this I need a bone marrow transplant. Many
people around the world are waiting for a marrow transplant, too. Please
volunteer to be a marrow donor:
http://www.abmdr.org.au/
http://www.marrow.org/
 

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