Esx qe 900.2 disorted

Struggling with this amp. Owner accidently connected speaker to ground when amp was on.
Repaired ps, and audio parts. Output transistors tip 35c and 36c are ok.
Changed 2q209 and 2q10. Other channel works fine. Tested most parts, can't find any damage. Audio ist disorted in higher frequency. Signal are at the base of the tip transistors without transistors inside. Voltage at base is also a lot different..
Bias transistor was also damaged.
 

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