Humming sound and speaker noise Beovision 7-40 MK IV

18 replies
T(
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takktakk (archived)
Bronze
Posted July 10, 2009 at 03:11 GMT
#1883103

Hi folks.

My new MK IV makes a distinct but very noticable hummingsound when it is turned on. It sounds about like a hard disk drive going at full speed. I have checked, and the sound is NOT from the internal BD drive. It also does it without dvd mode being active, more specifically when it presents a picture. As soon as the screen is blank, it goes away...

Anyone experienced this?

Also, when I put my ear to my Beolab 9's they are hissing. That was not the case on my MK II and one of the features of such a speaker is that it should not make any such noises when not in use - though active.

Any points of view?

O(
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obermurkler (archived)
Bronze
Posted July 10, 2009 at 03:20 GMT
#1883104

Hi takktakk,

what you hear, are the two fans on the underside of the panel. If the panel is in operation, ensure the two fans for cooling.

Greetings  

Obermurkler

T(
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takktakk (archived)
Bronze
Posted July 10, 2009 at 03:57 GMT
#1883105

Hi Obermurkler!

Thank you. I am aware of the fans, but it it's them they are quite more noisy than on my previous MK II where they could not be heard at all... This sound can even be heard distinctly as a background humming when watching tv and that is not ok... :-)

Don't you agree?

O(
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obermurkler (archived)
Bronze
Posted July 10, 2009 at 05:02 GMT
#1883106

Hi takktakk,

i telephoned with B & 0 Germany today. They said only the best fans will be installed in a BV7-40. So when you are looking tv with any sounds the humming shouldn't can even be heard. When it's not, they suggest to call the local dealer to change the fans units.

greetings

Obermurkler

 

E(
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Ehlerz (archived)
Bronze
Posted July 10, 2009 at 05:13 GMT
#1883107

Hi Takktakk

I havent notised anything of the above with my MK IV. I will try to have a look (listen) later today and will let you know!

T(
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takktakk (archived)
Bronze
Posted July 10, 2009 at 05:17 GMT
#1883108

Ehlerz wrote:

Hi Takktakk

I havent notised anything of the above with my MK IV. I will try to have a look (listen) later today and will let you know!

Thanks both of you!

Ehlerz: When you check, can you also push menu, highlight options, press red then go and check signal information. Does your TV also only output 50Hz no matter the source...?

E(
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Ehlerz (archived)
Bronze
Posted July 10, 2009 at 07:20 GMT
#1883109

takktakk wrote:

Ehlerz wrote:

Hi Takktakk

I havent notised anything of the above with my MK IV. I will try to have a look (listen) later today and will let you know!

Thanks both of you!

Ehlerz: When you check, can you also push menu, highlight options, press red then go and check signal information. Does your TV also only output 50Hz no matter the source...?

 

I will do that yes, so far i have checked wit analoge and digital TVchannels and both displays 50 hz

T(
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takktakk (archived)
Bronze
Posted July 10, 2009 at 07:23 GMT
#1883110

Ehlerz wrote:

takktakk wrote:

Ehlerz wrote:

Hi Takktakk

I havent notised anything of the above with my MK IV. I will try to have a look (listen) later today and will let you know!

Thanks both of you!

Ehlerz: When you check, can you also push menu, highlight options, press red then go and check signal information. Does your TV also only output 50Hz no matter the source...?

 

 

I will do that yes, so far i have checked wit analoge and digital TVchannels and both displays 50 hz

I just checked with a BluRay movie now. It displays 48 Hz. I thought they normally should display 96... exactly the double?

E(
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Ehlerz (archived)
Bronze
Posted July 10, 2009 at 11:16 GMT
#1883111

Hi Takktakk

I dont think there is a noise in my tv...cant be sure though, but nothing is apparent..

HOWEVER...i just found out what Moxxey means with audio delay in linkrooms. I have connected my AppleTV to AV5 as this is the only one with analoge audio. The sound in linkrooms are now delayed a bit, as moxxey says, this does not work how it is supposed to. One more thing...WHY cant BS3 downscale ANY HDMI input and display it in linkrooms?? My DVB-module and BD player are both connected through HDMI and can both be displayed in my linkrooms. AppleTV can however not, why is this??

MO
Offline
moxxey
BronzeFounder
Posted July 10, 2009 at 13:05 GMT
#1883112

Ehlerz wrote:

HOWEVER...i just found out what Moxxey means with audio delay in linkrooms. I have connected my AppleTV to AV5 as this is the only one with analoge audio. The sound in linkrooms are now delayed a bit, as moxxey says, this does not work how it is supposed to. One more thing...WHY cant BS3 downscale ANY HDMI input and display it in linkrooms?? My DVB-module and BD player are both connected through HDMI and can both be displayed in my linkrooms. AppleTV can however not, why is this??

Yep, and it works fine on the MKIII, which completely confuses me - what's changed to cause that delay in the MKIV? That audio delay was really frustrating. I'm tempted to keep this (temporary!) MKIII :)

No, you can't show an external Blu-ray player via a linkroom, either, nor the PS3 or Apple TV. Yep, that's very frustrating!

Do you see a slight judder in a Blu-ray movie on your linkroom TV? My BV8-26 would show a slightly juddery picture when I watched a Blu-ray linked to that TV.

BTW, I'm sure I contributed to this discussion saying that I heard hissing through my BL9s connected to the MKIV. Where are those posts?

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