Velocity Micro - High pitched ringing noise

O

OC 335i

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Oct 9, 2006
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Rather frustrated right now, this is my gf's PC and we've had nothing but trouble with it.

Just received the PC back from Velocity Micro to get it serviced for a high pitched ringing noise and it's STILL there. We ordered the PC in October, the computer did not come until late December due to Lian Li case delays (however there were several people on this forum who received their same computers weeks before we did although we had an earlier build date). Before VM shipped it back they said they basically put the whole computer back together and they could not hear the ringing noise. It is clearly audible. I work in IT, have built computers, and know this ringing noise is not typical. Tech Support is always friendly, but how good is service if the problem is still there? The PC at this point has been at Velocity Micro longer than it has been at her house.

Edit: The noise seems like it's coming from the mb/cpu. It doesn't seem to be the cpu fan (I have the same Artic 7 on my built pc).
 
What motherboard does it have? I had a problem with a Foxconn board that had a 12V molex connector on the board, it was supposed to be optional, but I had a similar high pitched ringing noise until I plugged it in.

Same thing with the CPU power supply connector, make sure it's an 8-pin one or at least if it's a 4-pin in 8-pin socket, make sure it's in the correct side.
 
Strange noises
MICROPHONICS
Semiconductors are not prone to microphonics themselves, but some other circuit elements can cause them. One case is the inductor used in some LC oscillators, particularly in the radio-frequency range. This effect can sometimes be minimized by firmly anchoring each turn of the coil with special adhesives such as RTV. Phase-locked loop circuits can be sensitive to microphonics generated by the physical movement of the inductor used in the oscillator.
Capacitor Failure Patterns in DC Circuits
The majority of capacitor failures, perhaps 90%, involve the internal shorting of the capacitor. Once shorted, the capacitor frequently causes power-supply overload, often causing the power supply to blow a fuse or other wise fail. In less drastic failures, the capaitor no longer functions to isolate DC voltages from one circuit to another. If power is still applied, this failure is easilly determined with a DC voltmeter since there is a zero voltage drop across a shorted coupling capacitor.
...If the electrolytics are bad, the oscillation can be a squeal...

James Perozzo: Practical Electronics - Troubleshooting
Click to expand...
 
Can you send an email to htaylor@velocitymicro.com with your GF's invoice or tech support number? I'll look her case up and then get back with you to discuss the details of what we found when we looked at it and so I can see exactly what's happening now. Under normal circumstances, I'd ask you the typical 'what do you have hooked up to the system that might be causing electrical interference' question, but you've indicated that you have a certain level of expertise, so I'll assume you've ruled out things like speakers and wireless phones.

We're not going to leave you hanging--I promise you that. I'll be waiting for the email!
 
I want to help you...but still haven't heard a word! Please contact us so that I can lend a hand?:(
 
could be a coil vibrating... hurry up and talk to heather, she always makes it right :)
 
Sorry for the late response. Not sure exactly what the issue was. I contacted VM tech support on the phone, we checked various things, loose components, stopping each fan, etc.. It was deemed it was most likely either the PSU or the Mobo. I intended to swap out the PSU since I had extra at work but after several reboots the problem isn't there anymore. The problem hasn't happened again so I have my fingers crossed.

FYI, I brought it into work (I'm in IT) and all my coworkers heard it. We couldn't figure it out it just somehow went away.

Thanks for your attention to this regardless.
 
OC, if there's anything I can ever do for you, just let me know. I wonder if it was some kind of weird interference? Ah, well...if it reoccurs, we're here for you.
 
Heather... I tried calling tech support all day.. no one answers the phone. Even Operator goes to voice box. Im having major problems.
 
Just was wondering does your GF have it hooked up to a UPS? Or just directly in a power strip or in the wall? Funny how you took it to work " plugged" it in at work and it went away. Thats called PFM :)
Love this forum board too, been thinkin on buyin a new rig somewhat soon. VM comes to mind and also ABS. All these little tid bits of info from this site realy does tip the scales.
 
xsvenom said:
Love this forum board too, been thinkin on buyin a new rig somewhat soon. VM comes to mind and also ABS. All these little tid bits of info from this site realy does tip the scales.
Click to expand...

ABS? Are you serious? Are you sure you don't mean AVA Direct?
 
We are having some serious issues with call volume because of Vista being deployed (still), but I do understand that you did get through yesterday evening. We had some work done on our phone system yesterday and will be adding more phones this coming week, so you shouldn't encounter any more problems after Monday or so. And if you do, just pop me an email...htaylor@velocitymicro.com...and I will get someone to call you.

(Much like these forums, I monitor my email basically 24-7.)
 
xsvenom said:
Just was wondering does your GF have it hooked up to a UPS? Or just directly in a power strip or in the wall? Funny how you took it to work " plugged" it in at work and it went away. Thats called PFM :)
Love this forum board too, been thinkin on buyin a new rig somewhat soon. VM comes to mind and also ABS. All these little tid bits of info from this site realy does tip the scales.
Click to expand...

PFM? What is PFM?

I doubt it's dirty power since I brought it into work and plugged it straight into the wall. The problem occured at, her place, my place, and my work. I do work with computers for a living. ;)
 
OC 335i said:
PFM? What is PFM?

I doubt it's dirty power since I brought it into work and plugged it straight into the wall. The problem occured at, her place, my place, and my work. I do work with computers for a living. ;)
Click to expand...

from acronym finder:

Premiata Forneria Marconi (band)
****** PFM Prison Fellowship Ministries
****** PFM Parietal Foramina
****** PFM Public Financial Management
****** PFM Pulse Frequency Modulation
****** PFM Porcelain Fused to Metal
**** PFM Produkte für Die Medizin AG (medical equipment producer, Cologne, Germany)
**** PFM Printer Font Metrics
**** PFM Pulsed Force Mode
**** PFM Pink Floyd Meddle (album)
**** PFM Pelvic Floor Muscle
**** PFM Proto-Flight Model (NASA satellite model)
**** PFM Personal Finance Manager
**** PFM Progressive Future Music (band)
**** PFM Pure Freaking Magic (polite form)


personally, Id go for pure freaking majic
 
ahh thanks. I need to correct what I said, I took it to work and it still made the noise at work. I tinkered with it a bit with the VM tech support, the sound was still there. Later on the day I checked all the connections and power cycled several times and the noise went away.
 
posible bearing going bad on HDD, DVD? Plastic on metal/plastic shriek (fan) or metal on metal vibration (like a vibrating PSU)? temp related?metal expands just enough after a while to make clearance. what is the system sitting on, carpet, wood, lanolium, stone? ambient temps the same (heat again).

anyway you can record the offending sound? localize, amplify and demonstrate.
 
0mega said:
could be a coil vibrating... hurry up and talk to heather, she always makes it right :)
Click to expand...

my guess as well...coli whine.

an old Abit mATX of mine had this...though I gather coil whine is largely found in PSUs...it does also afflict motherboards.
 
mket said:
posible bearing going bad on HDD, DVD? Plastic on metal/plastic shriek (fan) or metal on metal vibration (like a vibrating PSU)? temp related?metal expands just enough after a while to make clearance. what is the system sitting on, carpet, wood, lanolium, stone? ambient temps the same (heat again).

anyway you can record the offending sound? localize, amplify and demonstrate.
Click to expand...

It was a high pitched ringing noise similar to what you hear if your ears are ringing from music too loud.
 
Another vote for coil. Maybe you bumped it in the course of you tinkering and tweaked it just enough to change it's resonance frequency.

It could be that the tech that worked on your machine had some mild hearing damage and thus couldn't hear the high-frequency noise you're complaining about. Most people lose the ability to hear the highest frequencies audible to humans by age 30.

If it's gone and your system doesn't exhibit any other problems, I'd call it good and move on.
 
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