Cannot boot a late 2006 IMac

i got late 2006 imac needs files drive, machine had blinking power light know memory problem. re seated memory , computer boots, got white screen never past spinning circle. rebooted , re set pram , heard 3 chimes, rebooted same problem. have disk warrior , inserted disk , tried reboot holding down c key , same spinning circle machine powers off black screen.

took firewire cable mac pro booted imac using tkey, see fw logo drive not on mac pro desktop, sure not cable tried cable , same result.

 

while imac target disk mode , connected mac, show in disk utility or in terminal using command ls /volumes?

 

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