Yes. You blew the end amplifier of the system. Since you say everything went down. Can you give a better idea, step by step, what you did? your story makes almost no sense.
There are no user serviceable parts, the power unit may have a fuse or capacitor that has failed. If you want to look into fixing it then it could be a long haul with lots of test gear. On the other hand you may be able to get just the power board.
The turntable needs to be turning. If it is not a manual turntable. , all arm motion is controlled by the spinning plater,. At the end of the record it may shut off with the tone arm on the record or even return the arm to the rest post before shut off. Unless it has a control that is marked START or REJECT it may be a TT that was not designed to put the arm on the record
Stesso problema,lo accendo e si illumina il display,accendo tape 2 sull amplificatore e non va,oppure si sente un suono molto disturbato.dovrebbe essere qualcosa di semplice da cambiare,ma cosa??
The Kenwood KR-V8070 has no digital audio inputs; it only has analog inputs. You can see the manual's diagram of the rear input/outputs starting on page 4 at ManualsLib: https://www.manualslib.com/manual/287040/Kenwood-Kr-V8070.html?page=4#manual . If you need to connect a device that doesn't have an analog audio output, you will need an analog to digital audio converter. This is one version: https://www.amazon.com/SANOXY-Analog-Digital-Converter-Adapter/dp/B005F20756 . You will need to supply all of the audio cables separately.
The later KRF-V8070D does have coaxial and optical digital audio inputs. I hope this helps.
Cindy Wells