noisy second fan in HP (sounds like a blender!)

  • Thread starter Thread starter Jesusjacquez
  • Start date Start date
J

Jesusjacquez

My Hp pavillion a805n, has two fans. The first one is very quiet, and
the second one is incredible noisy, so much so, that I am concern that
the vibration can damage some stuff inside the machine.

I live in the south area of Lake Ontario, and heat an humidity are
bad, sometimes... so i was advise to dust it every two months. It
works sometimes, and sometimes the RRRRRRRRR sound comes back.

Is it possible to disable the second fan? or is necesary to the
system?

Thank you for any help or advise.

Jacquez
 
My Hp pavillion a805n, has two fans. The first one is very quiet, and
the second one is incredible noisy, so much so, that I am concern that
the vibration can damage some stuff inside the machine.

I live in the south area of Lake Ontario, and heat an humidity are
bad, sometimes... so i was advise to dust it every two months. It
works sometimes, and sometimes the RRRRRRRRR sound comes back.

Is it possible to disable the second fan? or is necesary to the
system?

Thank you for any help or advise.

There may be a way to silence it, but be the lazy sort that I am, I
would just replace it. I can't recommend that you disable it, but if
you're so inclined, you should be able to unplug it from either the
power supply or motherboard -- wherever it's drawing it's power.
 
My Hp pavillion a805n, has two fans. The first one is very quiet, and
the second one is incredible noisy, so much so, that I am concern that
the vibration can damage some stuff inside the machine.

I live in the south area of Lake Ontario, and heat an humidity are
bad, sometimes... so i was advise to dust it every two months. It
works sometimes, and sometimes the RRRRRRRRR sound comes back.

Is it possible to disable the second fan? or is necesary to the
system?

Thank you for any help or advise.

Jacquez

I would not recommend disabling the fan as they are there for cooling
and exhausting. Is the fan in question a case fan? Replacement case
fans usually have the 3-pin connector (to the mobo) and or a 4-pin
Molex connector (to the psu). They are simple to change and are quite
cheap. It sounds like the bearing in the fan is dying. Swap it out,
5min. job. Tiger Direct or Bestbyte in Whitby for a replacement.
-J
 
My Hp pavillion a805n, has two fans. The first one is very quiet, and
the second one is incredible noisy, so much so, that I am concern that
the vibration can damage some stuff inside the machine.

I live in the south area of Lake Ontario, and heat an humidity are
bad, sometimes... so i was advise to dust it every two months. It
works sometimes, and sometimes the RRRRRRRRR sound comes back.

Is it possible to disable the second fan? or is necesary to the
system?

Thank you for any help or advise.

Jacquez

On a computer like that, all the fans are necessary. Cooling is usually
carefully arranged.

The retail Intel heatsink/fan, has a thermal sensor in the fan hub.
The CPU fan in that case, speeds up the hotter the inside of the
computer case gets. In some cases, the fan can be noisy, because
of the high speed it runs at. A solution in that case, is to improve
computer case cooling. Sometimes the inside of the case is like
a sauna, and more cool air needs to be moved through the case.

The RRRRRRRRR sound, comes from a fan bearing with a lot of
slack in it. The fan no longer runs "true" and vibrates as
it is rotating. A squirt of oil can keep it quiet for a short
time, but eventually the oil drains away, and the noise will be
back.

Ball bearing fans are 3dB louder than sleeve bearing fans, but
the ball bearing fan will last longer. A typical preventive
maintenance interval for fans, is about 3 years. The very
cheapest of sleeve bearing fans, can wear out in one day,
which means their tolerances when they left the factory,
are so bad as to make the fan a useless purchase.

I've had fan noise before, where a wire got close to the fan
blades, and that is easy to fix. You'll have to open the case,
and figure out where the noise is coming from, to make more
progress on fixing it. Touching the center of the rotating
hub of the fan blade, can also help you identify which fan
is doing it. With a machine like the HP, it is possible that
a fancy plastic piece around the fan, will prevent you
from doing much to it. [URL manually line wrapped, to suit
my USENET server. Make one line out of it.]

http://partsurfer.hp.com/cgi-bin/spi/main?sel_flg=partlist&model=PS519AA&HP_model=PS519AA&
modname=Pavilion+a805n+%28PS519AA%29&template=main&plist_sval=ALL&plist_styp=flag&
dealer_id=&callingsite=&strsrch=&keysel=%3F&catsel=%3F

Fan [Chassis Parts] 5187-5223
Chassis cooling fan
Heat Sink [Chassis Parts] 5187-8413
Heat sink for Intel processors (Class F)

Paul
 
My Hp pavillion a805n, has two fans. The first one is very quiet, and
the second one is incredible noisy, so much so, that I am concern that
the vibration can damage some stuff inside the machine.

I live in the south area of Lake Ontario, and heat an humidity are
bad, sometimes... so i was advise to dust it every two months. It
works sometimes, and sometimes the RRRRRRRRR sound comes back.

Is it possible to disable the second fan? or is necesary to the
system?

Thank you for any help or advise.

Jacquez

Get a replacement e.g. from quietpc.com <--seriously check that place
out.

The guy there recommended

http://www.quietpc.com/gb-en-gbp/products/casefans/s-flex120800
Scythe S-Flex 800

Scythe 120mm case fan. There are other good makes. A famous one being
Zalman. Acoustifan is also quite well known

Regarding the other solution. the one you suggest.
Stopping the fan.

If it's an intake fan, maybe you could unplug it (or worst case, cut
the wires!)
intake fans aren't that important, the exhaust ones are more
important. 'cos if the air is coming out then it's gonna have to come
back in. It may not work the other way so much. I don't know how true
that is, or the science.

You could check case temperature , there are lots of temp checking
programs. like si sandra or speedfan. So then you'd see the effect of
unplugging the fan. How much hotter the case gets. Then you can decide
how hot is too hot.

I guess your CPU should be at a good temperature. (prob like never
more than 55, so idling at 50 is prob alright). Some will idle at 40,
some at 50, others at other values. CPUs vary.
The case maybe should be like 15 degrees below that.. i'm not sure..

But if you disabling an intake case fan makes the case temp go up, and
the cpu temp go too high.. Or maybe even if it makes the difference
between case fan and cpu temp very small, then the case is prob too
warm.
 
My Hp pavillion a805n, has two fans. The first one is very quiet, and
the second one is incredible noisy, so much so, that I am concern that
the vibration can damage some stuff inside the machine.

I live in the south area of Lake Ontario, and heat an humidity are
bad, sometimes... so i was advise to dust it every two months. It
works sometimes, and sometimes the RRRRRRRRR sound comes back.

Is it possible to disable the second fan? or is necesary to the
system?

Thank you for any help or advise.

Jacquez

It's doubtful the vibration will do any harm, except further
chewing up the fan bearing itself, and due to this lower RPM
the fan is in it will have a harder time providing ample
airflow, and if it fails your system will likely overheat.

Which fan are you calling the "second" one? If it's the fan
in the PSU, I recommend not running the system until it's
replaced. If it's the fan on the case wall, take the fan
off (may need to remove a plastic bracket overtop of it
first), peel back the sticker and remove the rubber plug and
put a couple drops of the thickest oil you have available in
it, while holding the fan frame parallel to the horizon so
the oil seeps into the bearing.

Put the rubber plug and sticker back on, reinstall and you
may then have a few days (sometimes much longer, depends on
how badly the fan was worn) to search for a new replacement.
Select the replacement based on same fan frame size, same
power connector type, and roughly similar current rating as
on the original fan's sticker. If the current rating is not
nearly the same, the odds increase that the replacement
might either not run fast enough and result in overheating,
or not slow enough and be fairly noisey. There is some
latitude here, you don't need an exact same part replacement
unless the fan is a very unusual type instead of having
normal boxed square frame.
 
It's doubtful the vibration will do any harm, except further
chewing up the fan bearing itself, and due to this lower RPM
the fan is in it will have a harder time providing ample
airflow, and if it fails your system will likely overheat.

Which fan are you calling the "second" one? If it's the fan
in the PSU, I recommend not running the system until it's
replaced. If it's the fan on the case wall, take the fan
off (may need to remove a plastic bracket overtop of it
first), peel back the sticker and remove the rubber plug and
put a couple drops of the thickest oil you have available in
it, while holding the fan frame parallel to the horizon so
the oil seeps into the bearing.

Put the rubber plug and sticker back on, reinstall and you
may then have a few days (sometimes much longer, depends on
how badly the fan was worn) to search for a new replacement.
Select the replacement based on same fan frame size, same
power connector type, and roughly similar current rating as
on the original fan's sticker. If the current rating is not
nearly the same, the odds increase that the replacement
might either not run fast enough and result in overheating,
or not slow enough and be fairly noisey. There is some
latitude here, you don't need an exact same part replacement
unless the fan is a very unusual type instead of having
normal boxed square frame.

I have to thank you all for your help.... Everything you guys said
sounds like it's worth to think about it (since the guy in Future Shop
wants to to what he wants and is his opinion and only his opinion the
one that counts!)...

I may have to look for another technician... but in my area the little
shops look kind of scary, and the guys not very trustable...

Thanks again!

Jacquez
 
I have to thank you all for your help.... Everything you guys said
sounds like it's worth to think about it (since the guy in Future Shop
wants to to what he wants and is his opinion and only his opinion the
one that counts!)...

I may have to look for another technician... but in my area the little
shops look kind of scary, and the guys not very trustable...


Technician? I suspect you can replace this fan yourself,
unless there is a warranty issue and you don't want to/can't
open the system without voiding that warranty.

It should only take a couple of minutes to take the cover
off, slide off a bracket if there is one, and exchange the
fan with a new one. Touch the metal chassis to discharge
static first then turn off the AC power to it before
proceeding inside.
 
My Hp pavillion a805n, has two fans. The first one is very quiet, and
the second one is incredible noisy, so much so, that I am concern that
the vibration can damage some stuff inside the machine.

I live in the south area of Lake Ontario, and heat an humidity are
bad, sometimes... so i was advise to dust it every two months. It
works sometimes, and sometimes the RRRRRRRRR sound comes back.

Is it possible to disable the second fan? or is necesary to the
system?

Thank you for any help or advise.

Jacquez

Probably too obvious to mention, but have you checked to make sure
that a cable or wire is not touching the blades.

Have been through this type of thing before, looking for the
complicated reason only to then find a simple cause and remedy. I
would move wires well away from the fan even though they may seem to
be clear as it can often happen that replacing case sides/covers
causes movement of such cables.

km
 
I have to thank you all for your help.... Everything you guys said
sounds like it's worth to think about it (since the guy in Future Shop
wants to to what he wants and is his opinion and only his opinion the
one that counts!)...

I may have to look for another technician... but in my area the little
shops look kind of scary, and the guys not very trustable...

Thanks again!

Jacquez-

if you want to find a techie, consider a local newspaper. In local
papers here you see the kind of advert of a person that can fix
computers generally. some also offer tuition , which may also
indicate they have the general ability.

some people have a techie in the family, or a friend that's a techie.
It happens, often parents who can't use computers have a son that can,
i've seen that many times. So techies in a family is not unusual. But
not all families have one.. and sometimes the techie cousin is too
busy to want to help his family!

As a techie that can communicate, i know i could speak to somebody on
the phone and quickly ascertain whether they know what they're doing,
their level of expertise. But you could answer an advert and talk to
them, tell them about the noise, and ask them about replacing a fan.
Agree beforehand that it shouldn't take more than an hour (they prob
charge by the hour). It's really a 10min job.

If i was the techie i'd get you through orderin the right fan(measure
it, is it 60mm,80mm,90mm,92mm,120mm ?, and i'd come over and put it in
if you couldn't do it yourself.

I have a fairly confident cousin that understands what i say, and if
he wants to install ram, i can talk him through it. Obviously
though, a techie putting an advert in a paper, wouldn't want to do
that 'cos you gotta call him out and pay him. But still, even if you
do that. Agree beforehand that it's not more than an hour. And make
sure his hourly fee isn't extortionate!
And that he understands about changing the fan.. And see if he knows
what he's doing about telling you what fan to get.. Or we could tell
you what fan to get, and you could tell him you've got a fan and can
he put it in.

But it's really a simple job of looking how the old fan is put in.
It's just plugged into the motherboard.

It's recommended to take the power cord out of the computer first
before plugging or unplugging things from the inside.


either do it yourself, or get a techie e.g. advertising in the local
paper. I wouldn't suggest a shop either. I've seen some of these
computer shops!

I was once in the bizarre situation where as a kid, i didn't have the
hardware i needed to troubleshoot my machine.. I had to take it to a
shop.. The technician was a zombie idiot , I saw him tapping the up
arrow on what might've been the F8 windows menu watching the highlight
move up and all te way down again, and up e.t.c. The sales guy was
working at the back as a technician, far better than the official
technician.

Fortunately it was quite an informal place. I ended up going round
the back with the sales guy, fixing my comp, as he fixed others.. Like
I was working there. in a cramped environment, reading some funny sign
that the place was like a hedgehog, a bunch of pricks. It was there
that I learnt of the electric screwdriver, from the techie 'salesman'
guy. A fun experience. But not for you! And that was a better shop.

I suggest as a possible solution. Calling techies from the local
paper until you find one that you think knows what he's talking about,
and what you're talking about! and is reasonable. That's better than
the shop you're trying, and perhaps better and cheaper than most
shops. It's a simple thing. Techies won't run from it. It's not a
nuisance job, like an intermittent thing, or a boring job like a
windows reinstallation thing or a backing up your data and
reinstalling everything thing. It's a short quick job.



..
 
My Hp pavillion a805n, has two fans. The first one is very quiet, and
the second one is incredible noisy, so much so, that I am concern that
the vibration can damage some stuff inside the machine.

The vibration wont damage the machine, but I would replace that fan
anyway.
 
Back
Top