Wiring for the arm head where the needle goes. Wires were unplugged by accident now not sure how to plug them back in. Rockola sybaris 474.thanks

Check to see if tone arm is in the correct position and did not get jostled out of place during the move.

Be sure needle did not get damaged.

Check to see if cartridge wires came loose during move.

Did turntable slip out of position?

Any cables come unplugged?

Any amplifier fuses blown or mechanism power supply fuses blown?

Where is the reset button for the ROCKOLA ROCKET COMPACT DISC LASER PHONO

If it's on ONE particular record, it may have a deep groove that the needle cannot move past. It could also be that you don't have enough pressure on the needle which you can adjust on the arm with a turn of the counter-weight (should be a knob on the other end from the needle)

Contact the folks at www.victoryglass.com and tell them the make and model of your jukebox. They will have the manual set for around $50. Also, they bought out the entire Rockola factory parts inventory. So if by chance you needed Rockola parts, they would have it.

Make sure the ground plug is not cut off of power plug. Also, if the power switch moves in 2 directions, it is a ground reverse, meaning switch it the other way. If it doesn't, look for a ground reverse switch somewhere on the back.

This could be many things and unless you are electronically adept it is unlikely you can DIY the repair... HOWEVER I want you to try one thing first: Sometimes the contacts on the switches of the Effects send and return go bad leaving the input to the power amp section floating and it can feedback. To test this, plug an INSTRUMENT cable between the send and return effects jacks on the back. This bypasses the contacts, If the amp behaves, you could run it this way getting a short cable or have the amp worked on at a shop to replace the jack. The jacks are really rather poor quality on musical amps in general.

2 wires plus ground needs a stereo 1/4 plug. Don't know Mark 4, but Mark 3 has 2 button fs with 3 wires plus ground. Schematic here: http://el34world.com/charts/Schematics/files/peavey/peavey_mark_3_bass_with_pa.pdf
shows 3 wires plus ground. Stereo plug does not have enough connections, only ground plus 2 wires.
Count the pins of socket and find DIN plug with proper pin-out for socket. Search google for DIN plugs.

NEVER trust colors... with an ohmmeter you can tell which is the common lead by testing... find the lead that has continuity to EITHER switch independently... It is PROBABLY the blue one... this will be the "sleeve" of the plug. The schematic documentation is so bad the jack wiring cannot be decipered as to which contact is the tip and the ring. HOWEVER once you find the common of the switches and connect it to the sleeve you have only two choices for the other wires so just try them.

You can also take the back off the pedal to find which color goes to BOTH the switches... connect that one to the sleeve. Try the other two wires for proper operation before final soldering.

Have you tried another cable between amp and guitar? Usually the cable goes bad first. Have you tried another amp or possibly tried another guitar on your rig? If this still indicates that your guitar's Standard 1/4" TS Jack is noisy, remove the oval cover over the jack and check the solder joints for the wiring. Follow the wires back to the tone and volume pots and check those solder joints. If everything is secure...Plug in, power up and check for noise while turning the volume pots stop to stop. If the pots make a scratching noise, shut down rig and unplug the guitar. Get a can of spray contact cleaner with a small extension tube (available at electronic shops) to spray in the pots while turning them. (May have to remove pots fom the guitar to get at small openings on side of pot can.) Spray jack and test for noise. Jack STILL
noisy...If you can solder...unwire old jack, remove from guitar, take to electronic shop, match to Standard 1/4" TS Jack, install in guitar, resolder wire connections and test. If you cannot solder...take guitar to
a reputable shop or dealer that does this repair. Good Luck! P.S. The
spray contact cleaner can be used on the amp jack, pots and switches
too...just make sure the amp is unplugged from the power supply before
doing any spraying.

Typically you have to unstring the guitar to get access to the insides.

Use a small miirror to view the insides. You may need to drag the jack out of the sound hole to resolder wires if they are broken. There should be three wires on the jack. One carries the audio, one the ground, and the third connects the battery when the instrument cable is plugged in.

After re-soldering the connections if needed, procure a piece of 1/4 inch wood dowel from your hardware store. Push the dowel through the hole where the jack goes and near the sound hole. Push the jack onto the dowel and then pull it back through the jack hole and pass the nut over the dowel and onto the jack threads and tighten. The extract the dowel rod from the jack.

It is near impossible to reach clear into the guitar body to put the jack back in without the dowel rod unless you have very tiny arms.