Whenever you get a hum, the first thing you should try is unplugging your laptop. I've found that most grounding issues start there.

Buy a 3-to-2 prong adapter, it elminates the ground post and will kill the hum if it's coming from your laptop.

^^^ I never thought of that

Actually i think its the mixer :(

I just plugged it in to my monitors at home and I'm getting the same buzz with nothing plugged into it.

anyone know if this is cheap to fix or should I consider looking for a new mixer ??

^pull the chord out first and try it, could be your laptop power supply going bad. also try pulling the battery out. eliminate the lappy before you chuck the mixer...

I didn't have my lappy plugged in. just the mixer going to the monitor....

ah, gotcha.....

Yup.... So the question remains, is this a cheap fix??

A lot of hum issues I've had have been with too much gear plugged into one outlet. Sometimes you don't have a choice since there is only 1 or 2 outlets available. But try spreading out your gear, that might help. It has always helped me out in the past.

its just the mixer and the monitor at this point.

you might also try different cables to elminate them as suspects.

If it is the mixer, you should look on pioneer's website, they have a list of authorized repair shops (hopefully one will be in your area) - with any luck, they will just need to replace the outputs on the back.

So the mixer is mobile?
Do you unplug your mixer FROM the mixer?

wiggle that plug around (at the mixer)
If not, try the wire at the socket.
the hum you hear is most likely a short (probably not grounding properly anymore)

If you hear a difference, and it's at the mixer, you might have to get it serviced.

If you're capable, open it, you might find where the wire or soder at the board needs to be repaired.

Also try your other cables...like the main one to your amps

Use this... It's a god send anytime you have to go RCA out... Works like a charm and almost guarantee will fix your ground loop issue...

www.radioshack.com

Ok Ill give these suggestions a try thanks guys :)

Im gonna try the cable swap idea first,

ZESH if its not grounding properly is it prolly something i can put a solder iron to ?? and would i see it visually ?

You should be able to see it when you crack the mixer open. Bfore you do, check and see if the female end is loose (pause)...heheheh

It might be the power wire itself. Can you get another from somewhere and test it? (don't plug any wire into just because it fits). Or have the power cable itself tested

Anyway, the answer is yes, as long as you're confident enough to try.

im goin in !! haven't been with a loose Female in a minute !!! forgot what it feels like HMM

you really can't feel much....

:(

LMAO !!

Man this thread went downhill FAST !

Soooo, any updates?? There are SO many threads regarding ground looping hum problems, but none about this issue. I also have a DJM-500 that is suddenly buzzing through the XLR outs. And only the XLRs. The RCA and 1/4" lines sound fine, but when a monitor (SRM-450) is plugged in via direct XLR, both L and R XLR outputs on the SRM-450 are buzzing. It does sound around a 60hz AC buzz, but louder than what s coming from the SRM-450 itself, with nothing else connected to mixer. Is this a transformer making noise, a bad XLR bus/pair of ports? Something else not grounded? Everything looks very clean and well connected inside. All POT nuts and other hardware well screwed down. WHERE is the buzz coming from??

I'd suspect the power supply electrolytic capacitors, given that the unit must be at least 10-15 years old.

Man so long ago I totally forget, I ended up taking it in for service. Can't recall how much they charged me or what the problem actually was. But I do remember them saying something about the caps pooching out.