Smd transistor test and JBL speaker repair.

[sspj9]

This board is from a JBL bluetooth speaker, wjere the comtrol buttons are. I beleive it is faulty as all leds ligjt with the d-mm on continuity however the leds on the left (were the power button is located dont ligjt up (on top and bottom of button) the device is faulty since as i swich on the power button the leds light up though immediately turnoff as i release the button (it tries to power up but doesn't) is this a sign of a short?, battery is charged well , its in good condition. I suspect the smd transistor as shown (S2A written on) what is tbis model and how do i test if it is faulty or not?
Any ideas on what else might be causing the problem?  I even checked the main board though no signs of shorts from the smd caps
Thanks

[poot36]

You can test it like two diodes.  If it is shorted it will show 0V if not anywhere between 0.3V and 0.7V on diode test.