Resetting the SMC

hi all,

trying fix 'dead' mac mini, have no idea whats been done before came hands wanted know happens if smc chip 'crashed' , how can recovered.

ive read smc switch easliy damaged if been pressed metal. im guessing has been pressed metal shiney silver been scratched. if remove switch , replace it, me 'reset' smc?

have removed battery on night , checked voltage , seems okay point of view. have wi-fi keyboard , mouse imac old imac g3 keyboard allow me try other methods of smc reset?

if can offer assistance, appreciate

 

i have maybe same problem.

can boot in mini when holding on/off button , connect powercable, hold on/off button pressed 5 sec.
ones more press on/off mac starting up.

 

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