Question about HP Pavilion Media Center a1330n - AMD Athlon 64 2.4GHz Desktop Computer (Open Box Product, Limited Avai... (EL466AAABAOB)

1 Answer

PC Grounding Problem

I have a very frustrating situation. Which is, I have been unable to resolve a grounding problem which results in a low-pitch humm when I connect my pc to my stereo system using an audio cable. It does NOT occur when I connect my iPod to the stereo using the same cable. There is no humm when I normally play audio on my pc. I have an HP Pavilion (Media edition) and a Pioneer stereo. I connect to the “CD” bank on the stereo since that is (presumably) “digital”. I have sent the signal from the PC to a radio via a wireless FM transmitter and then connected it to the stereo and there is no humm. Therefore, I believe it’s a ground fault from the “hard-wire” connection. I have done the following:

  • Swapped out sound cards
  • Connected a grounding wire from the pc tower to the stereo
  • Connected a grounding wire from the pc to the AC outlet
  • Connected both the pc and stereo to the same AC outlet

I am at my wits end. How do I diagnose/solve this issue.

Posted by on

  • 9 more comments 
  • noknees438 Feb 04, 2009

    The audio cable is solid and is not loose
    headphones are fine-no hum
    I've used line out (back panel) and headphone jack (front panel)- no diff- still hums
    Have tried PC vol at all levels- only chnages the volume of the hum



  • noknees438 Feb 04, 2009

    The audio cable is solid and is not loose
    headphones are fine-no hum
    I've used line out (back panel) and headphone jack (front panel)- no diff- still hums
    Have tried PC vol at all levels- only chnages the volume of the hum



  • noknees438 Feb 04, 2009

    The audio cable is solid and is not loose
    headphones are fine-no hum
    I've used line out (back panel) and headphone jack (front panel)- no diff- still hums
    Have tried PC vol at all levels- only chnages the volume of the hum



  • noknees438 Feb 04, 2009

    The audio cable is solid and is not loose
    headphones are fine-no hum
    I've used line out (back panel) and headphone jack (front panel)- no diff- still hums
    Have tried PC vol at all levels- only chnages the volume of the hum



  • noknees438 Feb 04, 2009

    The audio cable is solid and is not loose
    headphones are fine-no hum
    I've used line out (back panel) and headphone jack (front panel)- no diff- still hums
    Have tried PC vol at all levels- only chnages the volume of the hum



  • noknees438 Feb 04, 2009

    The audio cable is solid and is not loose
    headphones are fine-no hum
    I've used line out (back panel) and headphone jack (front panel)- no diff- still hums
    Have tried PC vol at all levels- only chnages the volume of the hum



  • noknees438 Feb 04, 2009

    The audio cable is solid and is not loose
    headphones are fine-no hum
    I've used line out (back panel) and headphone jack (front panel)- no diff- still hums
    Have tried PC vol at all levels- only chnages the volume of the hum



  • noknees438 Feb 04, 2009

    The audio cable is solid and is not loose
    headphones are fine-no hum
    I've used line out (back panel) and headphone jack (front panel)- no diff- still hums
    Have tried PC vol at all levels- only chnages the volume of the hum



  • noknees438 Feb 05, 2009

    I have an LCD monitor and yes the cable rises up through a drop ceiling near fluorescent lights but I already thought of that issue.  I dropped the cable to the floor away from the lights and still got the hum anyway.


  • Chris May 11, 2010

    Bear with me... I'm grasping a little here...

    Do you have a CRT or LCD monitor? When you hook it to the stereo, does the cable pass by any other electronic devices? (especially fluorescent lights, electric motors)

  • Chris May 11, 2010

    When you plug the audio cable into the computer, is it going all of the way in? If you slowly pull it out slightly, does it go away?

    Is it loose in any way?

    If you plug in a set of headphones to the audio output on the computer, do you get the hum?

    Are you using the "speaker out" or the "line out" jack?

    Do you have the computer's volume all the way up?

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Expert
  • 70 Answers

This ground loop isolator from Radio Shack was suggested when I did a search:
http://www.radioshack.com/product/index.jsp?productId=2062214

It says it has the 1/8 jack adapter, so it should plug right in!

I'd be curious to hear about the results if you try it.

Good Luck!

Posted on Feb 05, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Cricut explore one. Downloaded program,but get error message,wont install


Frustrated!!! [Driver installation problems][Resolved] - Make The ...

forum.make-the-cut.com/.../frustrated-driver-installation-problems-resol...

May 11, 2010 - 29 posts - ‎10 authors
I cannot get the Cricut firmaware to update. ... I just got a new computer with Windows 7, I tried to cut with the cricut but I get two error messages. RESOLVED Problem getting computer to recognize Cricut
26 posts
Dec 15, 2010
RESOLVED!!!Help Sending Cuts to Cricut
51 posts
Jul 24, 2010
Cricut Error: Unable to load drivers
19 posts
Jan 28, 2010
cannot get program to cut
18 posts
Jan 14, 2010
More results from forum.make-the-cut.com

Dec 28, 2015 | Computers & Internet

1 Answer

Chevy 3)4 ton vortex truck 199 has no power going to the starter amps are low, the starter will not. Engage electrical problem even when I jump it, voltage low, what is it


The first check is for proper grounding...If you have a multi-meter digital or with an analog meter, set it on the lowest scale...Place one lead on the clean top of the negative battery post and the other on bare metal of the chassis (fender bolt is proper)...meter must read less than 50 ohms...Continue holding lead on battery - post...Place the other on clean metal of engine...Same results; less than 50 ohms...If reading is high (1500 ohms;example) The vehicle needs 2 ground straps, one between - battery post and clean metal of chassis the other from chassis too engine...Without knowing if grounding is OK truck will have symptoms as you described...saailer

Jun 18, 2015 | Chevrolet Cars & Trucks

2 Answers

My amplifier is cutting out 30secs after I turn on the power why?


depending on the model number...sony had a bad run of amps that would exhibit the problem you are having...the fix was that it had a grounding issue with the various circuits within...there is a method we used to repair these sets where we would "bond" all of the grounding connections on the pc board with lengths of wire to one main grounding point...another possibility is that there are cold solder connections that are causing the unit to shut down. A cold solder connection may have conductivity when the unit is off, but when the unit heats up then the connection is lost resulting in shut down....I would recommend taking the set to your nearest service shop and get an estimate

Feb 24, 2011 | Sony Audio Players & Recorders

1 Answer

Passinger side tail light and tag light don't work. I replaced both bulbs and checked all fuses.


For easy testing, purchase a low voltage test light. It resembles a screwdriver with a wire pigtail. Clip the aligator clip on the pigtail to a grounding point on the car and use the probe to test for power in your light sockets. If there's power, your problem could be loss of grounding. You need both a power wire and a grounding wire to complete the ciruit. Look for a damaged or severed grounding wire.

Nov 18, 2009 | 2004 GMC Sierra

1 Answer

Technika FM In-Car Transmitter loud low frequency hum


This humming noise is the cause of a bad ground. try a new grounding location. The shorter the ground wire the better. Make sure the connection is metal to metal. I have had the same problem out of competition systems. Good Luck

Jul 20, 2008 | Car Audio & Video

2 Answers

Avic n2 help


That is just a ground problem....u can buy a noise isulator from the store for prob 20

Mar 29, 2008 | Pioneer AVIC-N1 Car DVD Player

1 Answer

Power-on "initializing" power-off, repeat same cycle(process)


The all-in-one product display always reads "Initializing" This may occur in a low power situation. Follow these steps in order to determine the cause:
  1. Verify that the computer and the all-in-one product have a three-prong power plug.
  2. Unplug the product cable from any power strips or surge suppressors, and plug it directly into a grounded (three-prong) wall outlet.
  3. If the all-in-one has an ADF with an external cable plugging into the back of the product:
    1. Turn off the unit.
    2. Unplug the power cable from the wall outlet.
    3. Unplug the ADF cable from the back of the product.
    4. Plug the ADF cable to the back of the product.
    5. Plug in the power cable, and turn on the power.
      • If no change, the problem is not the ADF.
      • If the problem clears, turn off the all-in-one, unplug the power cable, and plug in the ADF.
      • If the error returns, the ADF is defective. Contact HP Customer Care to get the ADF replaced.
  4. Unplug the USB or parallel communication cable from the back of the all-in-one and try to power up the all-in-one. The computer may be grounding out through the communications cable. If this corrects the issue, check the grounding of the computer and outlet. If the above steps did not resolve your issue, contact HP for additional issue verification or the servicing of your product.

Jan 04, 2008 | HP OfficeJet G85 All-In-One InkJet Printer

1 Answer

Subs make a noise


If your sub or its amplifier is placed too close to the transmission box, this situation can cause interference. I suggest that you buy a ground loop isolator or an RCA filter. If the problem is about grounding, then you have to buy a ground loop isolator. Otherwise, an RCA filter can solve your problem. First of all, the problem has to be diagnosed.

Jul 04, 2007 | Infinity BASSLINK Car Subwoofer

1 Answer

Sound Interference coming throught the Amplifier


On many occasions high pitch interference is a result of bad wiring and grounding problems. Check to make sure that you followed the manufacturer's instructions concerning grounding and installation of the amp, and if possible try and install it at another location in your house, using other electricity sockets. If the problem is solved by relocating the system, you might be looking at wiring problems (audio equipment can be very sensitive to that), if changing anything in the installation process solved the problem then the problem was probably due to bad grounding and "loose" electricity. Try making the installation as "clean" as possible, avoid tangled wires and stressing a single socket with too many electric appliances. If the problem persists, and you are still under warranty, I suggest contacting your local Yamaha dealer. If you're out of warranty I suggest locating a professional repair person.

Jan 17, 2006 | Yamaha DVX-S120 System

Not finding what you are looking for?
Computers & Internet Logo

115 people viewed this question

Ask a Question

Usually answered in minutes!

Top HP Computers & Internet Experts

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18377 Answers

Tony

Level 3 Expert

2598 Answers

Are you a HP Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...