If after de-soldering of C30 voltages on Q30 will be near voltages of Q10, so:
E= 1.6, B= 2.4, C= 7.9
Then You need to replace C30 with any 100nF (0,1uF) ceramic capacitor.
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If voltages will be still low as before:
E= 0.0, B= 0.28, C= 11.00
Then Q30 needs replacement.
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Regards
Tomasz