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Now that managed to recover the power, full refurbishment in progress. OP AMP section ...
With everything happening at the moment, not covered by the mainstream media but Japan was once again hit by huge earthquake this week (twice) so had to shift my priorities for it. Fortunately, minimum tsunami this time but still, many damages including the Shinkansen - the bullet train got derailed. Fortunately, the previous lesson learnt, foresight by many engineers and the technology prevented the disaster. ...
A while ago, another owner contacted me with the audio head unit issue. The owner told me that some time ago, it started with the cracking noise when the unit was still cold. However, once warmed up, seemed to be fine although there was imbalance between the R & L channels. Left like that for quite some time and then eventually, it completely lost the power and nothing happens ...