Help to identify a VSSOP-8 component
Possibly a TI audio amplifier chip. 



Also bears the AYK marking (and has a thermal pad). 



This may indeed be a procurement mistake. Perhaps you could share the specifics of the vendor just for general information. 

P.S. Try the DMM on diode setting to check ICs. Chances are you will see something on every pin relative to GND, with the (+) probe on GND.