Got some pioneer cdj 850's... Both have started humming an lots of interfirence through the system with in a few weeks of each other... How ever this goes if you push down on the rca's buy the input ? is this common an an easy fix ?

To perform a hard reset on a Pioneer CDJ-400, follow these steps:
1. Turn off the CDJ-400 by pressing the power button located on the front of the unit.
2. While holding down the Eject button (located on the top left of the CDJ-400), turn on the power switch.
3. Continue holding the Eject button until the display shows "PIONEER CDJ-400."
4. Release the Eject button.
5. Press and hold the Track Search Forward (">>") button and the Track Search Backward ("<<") button simultaneously.
6. Keep holding these buttons until the message "Resetting All Data" appears on the display.
7. Release the Track Search buttons.
8. The CDJ-400 will perform the hard reset and return to its factory default settings. This process may take a few moments.
9. Once the reset is complete, the CDJ-400 will restart.
Please note that performing a hard reset will erase any custom settings or saved data on the CDJ-400. Use this option with caution and make sure to back up any important data before proceeding.

my pioneer cdj 850 power is not coming up after losing and cleaning it i mistake-ling interchange the cover and the boot player refuse to come up

There are two types of reset to TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight; will be better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done

The 850's should work fine on 50Hz. They are spec'ed at 120/60. with your lower voltage the transformer in the power supply should NOT have a problem. There is nothing syncronized to line frequency so it should work fine.

I'm having the same problem. Just started like 2 weeks ago. I've had my MK2s since March.

I tried switching AC Power cables, it seemed to help, I have new cables on the way but I don't think that's the solution. I've read that the MK3s are having a similar problem, related to a fuse.

hi there, you got problem with your CDJ mother board,
ples get help of an expert or take it to pioneer service center

djajay

I could not understand what you just wrote.

Yes, a video would be best.

Although it sounds like the loading motor might be faulty.

- OPTiC

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i have the same problem...did u solve it?

More than likely you have a damaged CD transport, or needs to be calibrated or professionally cleaned. I would suggest taking it to a service center.

- OPTiC

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I have the same problem... I opened my CDJ and swapped the laser with one in my other CD player and it worked.

I ordered the part from Pioneer... model DXA-DA114... its about $50

You need to only be semi-comfortable with electronics to repair this. About 10 screws and a few plugs.

Hope this helps. Service costs would be some retardedly high price I'm sure.