Surf 1.2 PI Wrong polarity fried

[Firebird]

Hi, I successfully built and used it but last time I stupidly powered it up with polarity in reverse I have replaced the 555 IC which was visibly fried but still not working, could anyone please advise me what else to check?
Regards
Russell

[Sacchetti]

Hi, I successfully built and used it but last time I stupidly powered it up with polarity in reverse I have replaced the 555 IC which was visibly fried but still not working, could anyone please advise me what else to check?
Regards
Russell

Hi!
Check all polarised capacitors, the mosfet, the transistors, the diodes and all IC.

[Firebird]

Hi, all working again it was the 5v voltage regulator and diode.
Thanks