Explore & discover

Helpful Links

High Pitch noise driving me crazy!

Teacher

High Pitch noise driving me crazy!

I see that I am not the only one who suffers from hearing a constant high-pitch noise coming from the U-verse box or gateway. The noise is constant when the box is on or off. I have reset the box several times but still have the noise. Any ideas for fixing it?
Tags (4)
12,300 Views
Message 1 of 139
Expert

Re: High Pitch Noise so what is the answer


seadoodude1 wrote:

unscrew the 3 screws on the back, slide the cover off, unplug the fan that is under the HD.  This 4th DVR box I decided to fix myself with advice from this site and since the ATT guys cannot. Day 2 of the fix and no more noise and no other heat related problems.

 

BTW, concerning the standing on side hurts the HD, that is not true.  it is just a standard computer HD that are used in applications with flat and edge installations. 

 

I am now after a week finally enjoying my U-verse system.  Thanks for all the advice on this site. 

 

Message Edited by seadoodude1 on 12-02-2008 08:46 PM

Enjoy.

Message 121 of 139
Scholar

Re: High Pitch noise driving me crazy!


@ERI3K wrote:

I used an IR thermometer to take some temperature measurements of the DVR's processor:

1. With the case off and the DVR in sleep mode* the processor maintained a steady 143°F (62°C).

2. Restoring the case for 20 minutes caused the high-pitched noise to return. The processor temperature reached 173°F (78°C).

3. The noise faded to silence as the processor temperature dropped from 154°F through 151°F (68°C-66°C) after removing the case and allowing the device to passively cool.

4. At no point did the fan come on. So far as I can tell, the fan is entirely non-functional.

These results suggest to me that there is a correlation between processor temperature and the high-pitched noise. Whether the noise originates within the processor itself or the processor's waste heat changes the behavior of an adjacent component remains unclear.

On a related note, does anyone know what the maximum operating temperature is for the Sigma Designs SMP8634LF?

 

* The DVR was set to the recorded programs channel (9999) prior to going to sleep so there should have been no live signal being buffered. Once in sleep mode, the HDD powered down.

Message Edited by ERI3K on 08-29-2008 10:46 PM

When I had Uverse the fan on mine quit working. If the room temp was 75 degrees or warmer I could not watch any HD at all, caused wavy white lines and distorted picture. Called AT&T and they replaced the box. The fan should be on all the time and they will replace the box if it is not working, just call CS and they will send out a Tech with a new one. 

Message 122 of 139
Teacher

Re: High Pitch Noise so what is the answer

I've been having the same problem off and on for over a year with a VIP 1216. I bought a laptop cooler and put that under the unit, but it still emmitted that horible whine after being on for 30-45 minutes and would stop about 1 - 2 hrs later.

 

I finally got to where I couldn't take it anymore and called AT&T to have them replace the box a few days ago. Guess what, the brand new VIP 1225 started making the noise right after the Tech left! AAARRGGHHH!!! So, I got some 1" risers, tried that with the cooler, no good. Finally I went to try your fix on the brand new VIP 1225, I opend the case and guess what... No fan In this case!!!!  All I can say is the noise on this VIP 1225 is coming from the HDD. The only thing that stopped me from throwing the box out the window after the Tech, is this one stops whining after about 10 minutes with the cooler/riser setup.

 

 Dear God are they ever gonna fix this for real???!!?

I'm about ready to tell AT&T to shove this unit and go back to TWC.

 

 

Message Edited by evltcat on 06-22-2009 05:19 PM
Message 123 of 139
Master

Re: High Pitch Noise so what is the answer

thought about ac for your residence ?

 

 

 

 

:_P)

Message 124 of 139
Teacher

Re: High Pitch Noise so what is the answer

Okay, so I forgot to mention it, but we do have A/C, live on the west coast (near the coast), and keep our house around 72 degrees! And yes, I tried taking both the 1216 and 1225 out of the cabinet and they still whine. I have the 1225 on a shelf by itself, with the cabinet doors open, riser and laptop cooler and it still whines.

 

AT&T PLEASE MAKE MOTOROLA FIX THESE BOXES!!! OR, GET US CISCO BOXES!!!!!!!!!!!!!!!!!!!!!!!!!!

 

P.S. And if anyone suggest using a server room portable A/C to cool the VIP 1225, I'm goint to throw it at them!!! :-)

Message 125 of 139
Expert

Re: High Pitch Noise so what is the answer

I don't have AC, here in the Detroit metro area, and mine (moto) started to whine a bit last summer when it got hot.  It sits on my DVD burner that's now my 'clock' (on a tabletop left of the TV and just in front of it) and when it got up in the 90s it started a little whine, so I knew exactly what it was.  So I thought how do I raise it up w/o blocking air flow?  Took 4 pop bottle tops that were about 1" tall, rolled a piece of tape to make double sided and put them under the DVR feet and not a peep since. :smileyvery-happy:

 

Chris


Please NO SD stretch-o-vision or 480 SD HD Channels
1-800-983-2811 to avoid Mr. Voice Recognition
YRMV IMHO Simply a U-verse user, nothing more

Message 126 of 139
Expert

Re: High Pitch Noise so what is the answer


@evltcat wrote:

Okay, so I forgot to mention it, but we do have A/C, live on the west coast (near the coast), and keep our house around 72 degrees! And yes, I tried taking both the 1216 and 1225 out of the cabinet and they still whine. I have the 1225 on a shelf by itself, with the cabinet doors open, riser and laptop cooler and it still whines.

 

AT&T PLEASE MAKE MOTOROLA FIX THESE BOXES!!! OR, GET US CISCO BOXES!!!!!!!!!!!!!!!!!!!!!!!!!!

 

P.S. And if anyone suggest using a server room portable A/C to cool the VIP 1225, I'm goint to throw it at them!!! :-)


I have had a Motorola VIP 1225 and 3 STB's for about 1 1/2 months.  Each is on a shelf and well ventilated.  None of them have ever whined.

Message 127 of 139
Teacher

Re: High Pitch Noise so what is the answer

Well at least some of these new 1225 boxes work then. The one I got started whining about an hour after the tech left! I would request another one, but I don't see the point until AT&T announces a fix.
Message 128 of 139
Expert

Re: High Pitch Noise so what is the answer


evltcat wrote:
Well at least some of these new 1225 boxes work then. The one I got started whining about an hour after the tech left! I would request another one, but I don't see the point until AT&T announces a fix.

If you can put the stb in a well ventilated area that could resolve a possible heat issue the box is experiencing.  Others have posted that standing the dvr on it's side resolved the high pitched whine issue.  YRMV

Message 129 of 139
Master

Re: High Pitch Noise so what is the answer

Has anyone actually figured out what is causing the sound?   What amazes me is the fact that some subscribers are having the same problem with the replacement STB's.   We have the DVR and two STB's......since Dec. 2007.   All are absolutely silent.  I guess we are lucky.   I always assumed that the whine might be coming from the fan....dry bearing or something....but that seems to have been ruled out.   Is there an oscillator somewhere in the circuit that could be setting up a mechanical resonance at or above certain temperatures?   What comes to mind is the very common high frequency whine of horizontal output transformers in the horizontal oscillator circuit in old CRT tv sets.  In my younger days....when my hearing was much better.....that signal used to drive me nuts on occasion.  I haven't read all the posts on this thread so I may be covering ground already discussed.  If so I apologize.
The problem with socialism is that you eventually run out of other peoples' money.
.......Margaret Thatcher
Message 130 of 139
Expert

Re: High Pitch Noise so what is the answer

The issue was reportedly related to the dvr getting too hot, and the fan in the box turning on.  The whine is actually the fan inside the dvr running.
Message 131 of 139
Teacher

Re: High Pitch Noise so what is the answer

Yes, I've tried moving the 1225 DVR out of the TV stand and setting it on 1"x1/2" PVC Fittings. I'm using the fittings as a riser to allow more air-flow under the box. It still whines even all by itself outside my TV stand shelf.
Message 132 of 139
Teacher

Re: High Pitch Noise so what is the answer

It's not the fan in my VIP 1225. I took the thing apart and there is NO FAN in the unit! It's gotta be the HDD or something resonating on the system board.

 

Message 133 of 139
Expert

Re: High Pitch Noise so what is the answer

I know you aren't interested in calling and requesting another dvr, but that might resolve the issue for you. IMO
Message 134 of 139
Contributor

Re: High Pitch Noise so what is the answer

The whining sound is so high-pitched that not everyone will be sensitive to it.  I would not be surprised to learn that the issue causing the noise is present in all the motorola vip dvr's, but only a certain percentage of users can hear it. Somewhere above 15kHz.   The sound is not mechanical,  my guess is that it is caused by an oscillating capacitor or other component within the dvr or the power supply.  Too constant and high-pitched to be associated with a fan or spinning hard drive, and does not seem relative to temperature or duty cycle. On, off, cold, warm, recording, watching live or recorded hi-def or standard res, the sound is absolutely consistent in both frequency and volume.  The only thing that makes it stop is unplugging the dvr from the wall current.   I have tried to localize the sound to hear if it is coming from within the dvr or from the black plastic power supply that plugs into the wall, but the sound is so high in freq. that it is hard to directionalize.  This is yet another issue that will remain unresolved until AT&T first acknowledges it's existence. Not unlike the digital audio issues, the 'shotgun' approach of swapping boxes is not working. Tier one techs and help center folks simply don't have another solution yet, so they do what they can.  Meanwhile, we will wait for the tier two "AHA!" moment like the one that fixed the digital audio issue.

Message 135 of 139
Share this topic
Share this topic
Announcements
Additional Support