Just switched my needle on an ION Profile LP but no sound will come out of my speakers.

You did not specify model. Anyway, try this manual. It may help you.

User manual ION Profile LP (English - 20 pages)

Did you check the belt ?- if it comes off the turntable it will power up but not turn. Possible it slipped off since the unit was transported.

You can buy a new stylus from ION

http://www.ionaudio.com/products/details/ict04rs

well turn the mixer down. sound has NOTHING to do with the turntable . unless your needle is broke or dirty.

I know this is an old post, an I dont' have a solution yet, but t seems the same problem as on my Ion USB recorder - One of the input channels is not working. Like you, I found one of my music tracks not plying right - there was only the instrumental and no vocal. When I experimented, and changed round the jacks on the cable coming from the turntable (red and white plugs), I then got only vocals and no instrumental. Obviously one of the input sockets on the USB recorder is no longer working (I already checked the turntable and cable itself by playing back he same track with both stereo channels through my amplifier). You can either get the item replaced if its still under guarantee, or fix it yourself, if you have the necessary skills, neither of which apply to me.

"PHONO" is the only designated connection on a receiver that is literal and exclusive. Nothing but PHONO will work right on it and old-school turntables would require it to preamplify the tiny current produced by a Phono cartridge.

BUT, modern turntables like your come with their own preamplifiers, so they MUST be connected to a garden variety Line Level input like AUX (anything BUT Phono or it will overload).

http://www.needledoctor.com/Ion-LP-Dock-Turntable?sc=7&category=16189

"LP DOCK also has a line-level output for connecting to any home stereo with an AUX input"

As far as WHY your amplifier isn't making da music, that could be whole 'nother problem.

We'd need more details about it and the speakers to go there.

i had the same problem at first, if you have anything other than a usb output to your speakers go into control panel/sound/change system sounds and disable usb speaker device.

sounds like your drive belt needs replacing.

If you're picking up background (room) sounds the TT pickup is acting as a microphone. Isolate it physically from air- and room-borne vibrations. Turn your speakers down so they don't add to the problem, or use headphones while recording.

Check for lint or dirt on your stylus. Be sure that the player is grounded.