HELP! Heavy feedback when laptop charger is plugged in

[The_Blue_Dragon]

Hi people,
Im in deep trouble now, coming upto christmas and Im fully booked. Ive just got back from a 50th Anniversery which before it even started was a disaster.

I set everything up and for some reason I could hear lots of feedback coming from the speakers. I checked everything and unplugged everything one by one and found it to be a problem with the charger.

For some reason when ever the charger is plugged into the laptop it creates loads of feedback. I need to work out whats causing this because I no longer have my reserve laptop because work has asked for it back over xmas.

Anyone got any ideas?

[One Vision]

This is probably one of the most spoken about topics on the forum, "ground loop isolator).
The problem is that laptops, powered external hard drives etc. have only a 2 pin connector, same as your traditional radio lead i.e no direct earth to the plug.
Like I have said probably one of the most talked about subjects on this forum, laptops were never designed to do what they do today so you have to bring them up to date.
To be successful with a laptop setup you HAVE to have a reasonable output source, a headphone socket is just that and not designed for quality output so you NEED an external sound card that has the appropriate outputs.
Again with the power supply its no good for DJ applications so you HAVE to have something to filter the earth problem i.e an earth loop isolator.

You have to use professional equipment for a professional application, so if you want high output, something designed for home use is going to have some kind of issues, either it just wont last the course or other issues just like this.

[The_Blue_Dragon]

Ive never had trouble with it before though thats what confused me

[Grahame Case]

looks like you need to buy yourself an external soundcard for your laptop - i bought one for my laptop - not for DJing - for surround sound, and the audio quality is far superior to the onboard port.

[spin mobile disco]

Do you mean feedback ( a high pitched tone that almost deafens you) or a loud hum that is very annoying?
Just for clarification

[The_Blue_Dragon]

a humming, I thought it was all the same lol. Annoying

[Tony Scott]

Get a ground loop isolator: http://cpc.farnell.com/AV12774/audio...branded-a-1095 ....cost about £5.

Have you changed your mixer/amp/processing or changed any of your cables recently?

[The_Blue_Dragon]

Would one of these be ok?

http://www.ebuyer.com/product/106540

[Sapphire Disco]

I bought 2 from MAPLINS they work fine , you will find them with the car bits just thought I would let you know in case you want them today.

[Woodyo]

If this has never happened before , it may be a dodgy lead connecting your laptop to your mixer , also worth checking all your earth connections on your extension leads as these work loose sometimes.