Loud hum when plug in stereo jack to pa

HP Pavilion dv9740us Notebook PC
When i try to plug a stereo jack into the headphone jack to conect it to my PA System I get a loud hum?
when I attempt this with any other computer i have no problem just with my HP i get this loud hum. I can plug it into a Logitech PC audio system i have or my line 6 amp cd/mp3 port.
I am using a mini stereo jack to to rca jacks and plugging into my Carvin pa tape return jacks. This works with every other computer I have but not with my HP?

Have you tried to connect it to anything else using the same cable?
I assume that you have the right input selected on the stereo, but I can only think of 3 reasons for this:
1) Wrong input on the stereo, or some setting on the stereo prevents output.
2) The iPhone does somehow not work with this cable.
3) The cable is broken.
Try to eliminate these one by one, e.g. by connecting the iPhone to some other
stereo, etc.

Similar Messages

Loud hum when Imac sleeps

i've been using my imac g5 for a few months with no issues what-so-ever. just recently i've run into one major issue. when the computer puts itself to sleep...i get a loud humming noise that will not stop (i think its the fan running. the power button is disabled and i have to unplug the computer and plug it back in to restart it. any idea what the problem is? i think i may have changed the power saver settings just before this issue surfaced, but i'm not sure what would cause this to happen.

What it's doing is going into sleep mode and this is normal. You should be able to wake it up just moving the mouse or pressing any keys on the keyboard. What I want to find out is whether it's hanging up when it goes to sleep or if it will wake up normally as it should regardless of the humming sound. To check the Energy Saver settings go into System Preferences/Energy Saver.
George

IPod hums when plugged in.

My iPod's battery recently completely died to the point that is shut down. I wouldn't restart so I figured that it just needed to be charged. When I plugged it into my computer all it started to do is hum lightly. Its kind of like a buzzing sound. It is unresponsive of any buttons so I can't reset it. My question is: Is my iPod a paper weight now or can I fix it?

You may have a bad iPodDriver.kext file. You can either archive and install to replace it or try the last post by lynque in this thread: http://discussions.apple.com/thread.jspa?messageID=5033398&#5033398. Before you do this, try putting your iPod in disk mode (http://docs.info.apple.com/article.html?artnum=93651) and if you can see your iPod in iTunes after this, Restore it.

No Audio From Headphones When Plugged Into The Jack

I have plugged numerous amounts of earphones into my only headphone jack. I know that the earphones work, because when they are plugged into other devices, they work just fine. But, when any earphones are plugged into the headphone jack, I only hear sound
from my laptop speakers that are built in. The sound worked the very first time I plugged in my earphones, but now they don't work.

Check : http://social.technet.microsoft.com/Forums/windows/en-US/9f2c4907-fc80-415b-8bae-ba42c83e7215/front-jack-not-recognizing-microphone-headphones-are-ok?forum=w7itprogeneral
Arnav Sharma | Facebook |
Twitter Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members
reading the thread.

Why do I get a loud hum when adjusting the screen brightness?

I am getting an annoying Hum and the loudness depends on the how bright I have the screen, as I turn it down the hum becomes quieter. This is super distracting as I like to run my sound through external speakers, but the hum is just enhanced. I brough my unit it for service, they sent it out and said nothing was wrong with it.... Any ideas? None of my other computers make this hum!

Sounds like the inverter, which powers the screen is going bad. I'd bring it back.

Why do I get a humming noise from my stereo speakers when I plug in airport?

Why do I get a humming noise from my stereo speakers when I plug in my airport?

Temporarily, please turn off your amplifier and/or powered speakers and disconnect the plug that goes into the AirPort Express audio jack.
Plug a pair of headphones directly into the AirPort Express and listen for a few minutes.
Do you hear the "hum" that way?

Loud Hum from Stereo when using the Dock

I have the iPod dock connected to a rca Aux.input on my stereo using the mini to RCa audio cable that comes with the Airport Express stereo connection kit
It produces a very loud hum thru the stereo speakers even if iPod not in the doc,unplugged the cable from the dock and the hum stops.
Had the same result with a put together cable.
Is this a problem with the dock, had no problem using el'cheapo puter spakers

You should try and see if there is any way that you can push the jack into the Dock any more. This is especially the case if you can see any of the metal part of the jack, this means it is not inserted all the way. The hum is usually a result of not inserting the jack far enough. You can do this with the cheap computer speakers if they were not inserted all the way. Just try pushing it in a little farther or wiggling/twisting it all the way in to see if that does anything.

Headphone Jack no sound when plugged in ?

music plays fine , when i plug in the jack the music stops (as normal) but no sound from headphones/jack ? pleas help thanks....

emeres wrote: Do you look for something like this?
I am not sure. I had a look at the code (I dont know Perl, though), and it seems that, in the end, all it does is issuing
pacmd set-default-sink x
However, when I do this manually, it doesnt switch the sound to the other sink.
emeres wrote: I would check if udev recognizes that headphones are plugged in/out (udevadm monitor), create a rule and a script setting the default output via pacmd. Or create a systemd service, or your own script periodically checking the status.
Unfortunately, udev does not seem to detect plugging in or out
(udev monitor doesnt output anything when I plug headphones in or out).
However, I can see the change in pacmd list-sinks as described above.
When I set pulse log level to debug, I also get some output from there, indicating that it gets recognized:
D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now unplugged
D: [pulseaudio] device-port.c: Setting port analog-output-headphones to status no
D: [pulseaudio] module-switch-on-port-available.c: finding port analog-output-headphones
D: [pulseaudio] module-alsa-card.c: Jack 'Front Headphone Jack' is now plugged in
D: [pulseaudio] device-port.c: Setting port analog-output-headphones to status yes
D: [pulseaudio] module-switch-on-port-available.c: finding port analog-output-headphones

I connected my iPod Touch to a stereo system phono input using a cable with stereo jacks (red and white) on one end and that plugs into the iPod's headphone jack. The problem is that the sound is extremely muffled and bass-heavy, with little treble.

I connected my iPod Touch to a stereo system phono input using a cable with stereo jacks (red and white) on one end and that plugs into the iPod's headphone jack. The problem is that the sound is extremely muffled and bass-heavy, with little treble. I have to turn the bass control on the stereo receiver to pratically zero in order for the sound coming through the stereo to be acceptable. Is there a setting on either the iPod or the stereo that I need to change in order to fix this?

The phono input is for a phonograph. The iPod does headphne output is not that same as a phongraph output. Does th stero have an AUX input? That should be compatible.

Re: Qosmio X500-02G - Hum when I plug in into amp

Why does my Toshiba laptop hum when I plug into amp when using power adapter Qosmio X500-02G.
When I run on baterry no hum

Hi drs,
That means your notebook creates noises when AC/DC adapter is connected?!
Well, its hard to say something about this. Is the noise coming from your notebook or AC/DC adaptor itself?
What operating system you have installed?
Are you using newest BIOS version?
In your case I would check the current BIOS version and have a look on official Toshiba website for an update. After the update load the default settings in BIOS and check if this worked or not.

My mac book pro doesnt start up after a small flash in jack when plugged in

my mac book pro doesnt start up after a small flash in jack when plugged in

It's a mac book pro 17", OS X 10,5 . It worked perfectly but when I (or actually my friend) plugged the jack into the wall outlet it came a small flash (in the wall outlet) and then it didn't start up. No sound, no light on the screen. I didn't actually see what happened, but I asked if she plugged it in with the magsafe wire still attached to the computer, and she believed she might have. Is there anything to do? I have a couple of mac computers, two other mac book pro (writing on the newest one now - 13" - late 2011 - OS X Lion 10.7.5), if it could help.

Nano plays music out loud even when ear buds are plugged in?

Nano plays music out loud even when ear buds are plugged in? its like the external speaker is always on, i cannot figure out how to turn it off....HELP SOMEONE

You don't have to shout - typing in caps.
The earphones must be pushed very hard into the iPod. So hard, that the white part of the plug must touch the iPod in order for the external speakers to turn off. You will hear a click.
 If you do a forum search, you will find this same solution. If it does not work, you will need to take your iPod to an apple store or call the Apple iPod tech support if still under warranty or you have Apple Care.

Charger Buzzes when plugged into the Adapter Converter

Im in England currently (From the USA) and am using a "DYNEX" converter adapter to switch the electric current down so I can plug in/charge my Macbook Pro and iPad.
It works, however the charger buzzes pretty loudly and gets hot.
Thankfully I brought two, one started smelling like melted plastic and stopped charging altogether. That particular charger has faulted at home before (back in the USA), so I'm not sure if it died because of the converter or because it's just faulty.
I have plugged in the newer charger and it also buzzes, but I'm really worried to keep it plugged in because I don't want it to fault out too.
Is it normal for it to buzz like that when plugged into a converter adapter?
Thanks!

The question again, why are you using a voltage converter? The Apple charegers are all rated for 100-240 volts at 0-60 Hz...you only need a plug adapter to convert the US HEMA plug to the UK two round pin plug.
Adding a voltage converter is adding one more failure point into the system.
I have used mine all over Europe with no issues.

Sparks when plugging into wall

Has anyone else ever noticed that the Powerbook AC adapter tends to spark when plugging it into the wall? Every now and then when plugging it in you will see and hear a spark pop right between the prongs and the wall outlet. Both of my Powerbooks have done this off and on since I got my first one a couple years ago. Not really a problem, just always kinda wondered why it does this. Anyone know the answer?

My experience with the adapter didn't go as well as the rest of you... A few weeks ago those harmless sparks fired my PowerBook. There was a ground in the adapter that would often prevent charging but that day it did more. there was a larger than normal spark and then a humming coming from the connection to the computer. when i tried to turn it on nothing happened even with 30% battery.
Anyway, when I got it back from repair they had replaced the motherboard, sound card and battery. Suprisingly Apple didn't replace my adapter, I had to call and remind them why they did all the work in the first place. The new adapter doesn't spark (yet).
Moral of the story; never connect the power cord to your computer before pluging it into the socket. My 2 cents.

I have an iMac running snow leopard. I have trouble with my internal speakers, I cannot adjust the volume without having an earphone plugged into the jack.

The volume only works when I have earphones plugged into the jack, otherwise when I try to adjust the volume it has a circle with a cross. Ive tried restarting it with and without the headphones plugged in. However it does make that mac sound when turning on the machine before the apple logo comes on and takes me to the desktop screen. Is there anything I can do to fix this??

I'm having a very similar problem.
I've got a 2010 iMac that I've got hooked up to my Pioneer Elite via HDMI cable using the Moshi adapter.
It's been working great for months, but today the audio began dropping out -- a fraction of a second, every six seconds or so.
I installed the latest Snow Leopard update today. Does anyone think there might be a connection?
thx!

Loud hum when plug in stereo jack to pa

Similar Messages

Maybe you are looking for