Odds are the IC is shorted. If so it & the 18 ohm should get hot to the feel.
Anything else on that pin is suspect next ( cap to GND )
Next is the output pin. Normally its apx 1/2 of the B+ voltage
to the IC then cap coupled to the head jack & SPKR.
On thru hole IC's its simple to lift pins to test BUT with SMD's a PIA
so if you have good eyes & steady hands change the chip.
73 Zeno
LFOD !