Where is the ground wire connected to on the Technics SL-BD27?

I would check the weight and allignment.

A grounding wire is just a piece of wire connected to an earth point on the deck, connecting to an earth point say on a radiator pipe. There's nothing special about this wire any old piece will do. You only need it if you get a hum noise when the turntable is connected to the amp.

Usually, on Technics turntables, the ground wire is attached to a ground lug on the receiver.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

Hello,
You don't need the original ground wire for Technics SL-BD20D turntable,
any plain cable can be used for this purpose...
you should connect turntable to your pre amp,should be a "phone" input at the back...
here are some suggestions for grounding....
---------

Plug in a surge protector to the outlet, and then plug all the components into that surge protector

Connect a ground plug to the surge protector and then plug the ground plug into the main outlet. A ground plug is available at any hardware store, and turns a three prong connection into a two prong. Ground plugs help eliminate 60 cycle hum.

Connect the ground wire from your turntable to the ground wire connection on the receiver. If this doesn't work, looking on the back there should be a grounding point,

Unplug your receiver.. Split a wire and attach one of the splits to the receiver where you will see the text, "ground" or something similar. Attach the other end to something metal such as a pipe that goes into the ground. Secure with electrical tape. Plug in.
connect the ground wire to a screw on the electrical outlet.

--------
Take care and please Remember to rate/vote and give me 4 Thumbs Up
for Helping out the Community :)
Hope this helps!

Is the ground wire from the deck connected to the mixer?.

If everything is connected ok then the ground wire or phono cord could be faulty - look here for replacements :-
http://stores.ebay.co.uk/methleykev

Could also be a "ground loop" - try a ground loop isolator.

just get any small speaker wire and use that as your ground , attach that to the reciever you are using

Yes you need a pre amp

It would also be the same if you connected it to a computer to record an LP to CD. Mine is a little different and has one already built in that I can switch in and out of line.

Try spend a little more if you can as many pre amps can introduce noise.

You may also want to check that the turntable is properly grounded to prevent noise too

hi, try to open or remove the platter on the deck, maybee there some small thing inside..

the auto stop mechanism needs adjusting

You have 4 wires coming from the needle pickup to the cables which connect to the amplifier/receiver. I would check the needle, the pickup unit, and the leads from the pickup to the cables. You can probably run a continuity test or ohm test for verification. If that checks, pickup and needle is your next step.