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.