KLH 21 with issues...

[miniman82]

A guy at work said a radio his folks owned all their life was having issues, so he let me have a crack at it. I've already replaced all the power supply capacitors, but it still fails to tune in any stations. The audio amp works perfectly, so something is up with the tuner. Are there any common faults with these? I can hear white noise through the speaker, but rotating the tuning knob dos nothing. Ideas?