some Leds or Led flashers are polarity driven. It shldnt blow anything, but I would check every fuse after obviously resetting machine with std globe back in etc. Then, i would change out the holder the bulb went into in case something melted inside etc.

Other than that, if that dont work, it may have travelled up the wiring to the nearest diode/resistor. Then its time for a multi meter and to check driver transistors etc.