Can't use start up commands - Need help of some experts


trying reset pram in order fix firewire-port-issue bot not succeed. press cmd-alt-p-r before grey screen comes , continues press these keyes nothing happening.

have treid other start commands nothing happens.

have tried both full alu keyboard , alu-keyboard without num pad - makes no difference.

have maked sure firmwar-password dissabled.

have mac mini 1,83ghz 2gb ram 10.5.8 running.

need help!
 

but mac still works fine, except firewire port?
 


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