IMac G5 running OS 10.4.11. Started playing with a bluetooth speaker (may or may not be related). Now I cannot get past the blue screen on startup. I can get into safe mode. Tried install disc for disc utility and reloaded OS. Still get blue screen.

I have an older iMac G5 running OS 10.4.11. The other day I started playing with a bluetooth speaker (may or may not be related). Now I cannot get past the blue screen on startup.
I can get into safe mode. But no regular startup.
I tried disabling bluetooth, thinking that might be related. It didn't help.
I even tried using the install disc to run disc utility. That didn't work so I reloaded the OS.
But I still get hung on the blue screen when trying a normal startup.
All help would be appreciated.

Try resetting the PMU/SMU and PRAM/NVRAM. You'd need to identify the mode of resetting depending on the model of your G5 iMac. The Apple support sites that would help you for this are –
http://support.apple.com/kb/HT1436
http://support.apple.com/kb/HT1939
http://support.apple.com/kb/HT1767
http://support.apple.com/kb/HT1379
I hope this solves your problem.

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