[mythtv-users] Humming Noise coming from LCD tv

[Hika van den Hoven]

Hoi Stephen,

Friday, April 4, 2014, 3:10:37 PM, you wrote:

> On Fri, 4 Apr 2014 14:15:00 +0200, you wrote:


>>About getting your machine more quiet. Normally the main source of
>>sound are the ventilators and sometimes the harddrive. You can buy
>>quiet fans and powerunits. In general the bigger the fan the quieter.
>>Also bios programm's like cool and quiet (AMD) can help. They keep the
>>fans at minimum speed. You need a 4 wire connection to your fan to
>>manage the speed and your motherboard needs to have such connectors.
>>Often it only has for the processor fan. In a lot of biosses you can
>>manage the profile used. Keep the ventilation openings of the computer
>>well free for a better airflow. Your fans then can spindown further.
>>You can also look inside if all wiring is properly laid aside, so not
>>to hinder the flow.

> I have always found that the loudest fan in my PCs was the one on the
> video card.  So now I only buy silent video cards for my MyhtTV boxes.
> I think there is at least one silent Nvidia 630 card available at
> present which should do everything necessary for MythTV.  The downside
> of silent video cards is that almost all of them take up two
> motherboard slots due to the big heatsinks.  Of course, quite a few of
> the higher powered video cards with fans also take two slots now too.
> If a silent video card only takes one slot, it is probably not good
> enough for what MythTV needs for VDPAU with the best deinterlace of
> 1080i.

> I also buy quality power supplies - they have fan speed control and
> usually have things like heat pipes to help the cooling rather than
> relying on the fans to do all the work.  And the top spec power
> supplies are more efficient, so they lose less power in the power
> supply and hence generate less heat, which means they can run their
> fans slower.  There are even some fanless power supplies for lower
> power multimedia boxes, but you need to be careful with them as some
> cases rely on the power supply fan for part of their airflow
> requirements.

> Avoid the new Seagate "red" (= NAS) hard drives.  Their sound level
> specification is good - they are not actually too loud.  But the
> quality of the sound from my 4 Tbyte red is a sort of sharp metallic
> click, and makes it much more noticeable than the duller thuds of my
> other 3 and 4 Tbyte drives (WD green, Hitachi).
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One other thing about the soundlevel from your machine is the height
you place it. If you place it high more sound reaches your ear. The
down side of placing it to low is it will suck in more dust, which
negatively influences the cooling. you anyhow should ones or twice a
year dust the inside of the machine, but don't use a vacuum cleaner
for that creates a lot of static electricity, which can damage your
system.

Tot mails,
  Hika                            mailto:hikavdh at gmail.com

"Zonder hoop kun je niet leven
Zonder leven is er geen hoop
Het eeuwige dilemma
Zeker als je hoop moet vernietigen om te kunnen overleven!"

De lerende Mens
--