The only problem in all that time was the blue power light failed after about 1 year (which never bothered me).... And the spring behind the power-on button didn't retain its strength to push back out in the 'off' position.
Again this did not bother me as I kept it powered 'ON' for the full 30 years :-)
It was....and still is a superb sounding amplifier which was only surpassed in my system by the Halcro DM58 monoblocks about 5 years ago.
The Perreaux amps of the 80s were true high-end products designed and built by Peter Perreaux in New Zealand......and were better than those produced under the Perreaux name after that time.
I can still happily listen to it today.......