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I'd change out the silver lytic can right of the motor IC. Mine looked fine, but was causing the motor to intermittently die. That cap is almost certainly bad on yours. Unless you have an ESR meter or the cap happens to have failed shorted/(electrically)leaky there is little chance of a test telling you whether it is good or bad.
If the cap that was going bad in mine could cause the motor to stop turning periodically, then the one in yours is probably fully bad and the main problem.
Replace that cap with one of the same capacitance and same or higher voltage. The replacement does not need to be surface mount it just has to fit in the space available.
Don't leave the motor's rotor installed during the cap replacement work (lest you risk damaging it like I did). Before you plug in your soldering iron unscrew the metal retainer left of center over the rotor, then pull the rotor out, and set aside until the cap solder work is done, then reinstall the rotor and retainer.
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