First step would be to download the service manual, normally available from hifiengine, you will need to register, part of the protection against robots.
It's a safe site, then refer to the adjustments chapter. Do not touch the adjusters for the tuner unless asked to by another AKer. Appears the CR1020
does not have an adjuster for dc offset, which may be related to your problem. You should check the idle current as part of general house keeping.
No relay click typically means failure in the protection circuit (component, bad connection...) or excessive dc voltage is present on the speaker line
and the protection circuit has released the relay so as to protect the speakers. Need to determine which.
Remove woodwork, locate the relay (on power supply board underneath???)
Near the realy are 2 pins LI(Left In), RI(Right In).
Need to measure the dc voltage at LI, black multimeter probe connected to chassis or phono ground or black speaker post.
Should be less than 100mV, however it could be 1->50-??Vdc if faulty
Repeat for RI