I can't restart without pushing the power button on the front of my G4Tower

When I try to restart from the apple menu or the sys prefs the menu bar goes away, the sundry icons go away and the dock goes away leaving me looking at my desktop picture. But nothing happens after that. It just sits there being a very expensive picture viewer. I recently installed Tiger on both my internal and external hard drives; but since the sys prefs restart won't work then I can't change my startup disk either. I need to be able to use the external for some activities requiring transfer of old OS 9 files since I still can't get OS 9 to start on the internal and can't, now, try to work it from the external because the restart button won't work. I was going to archive and install Tiger on the internal but there wasn't enough room. I would wipe the internal if I was sure I could start from the external but am becoming dubious about that also. It is hard to save my stuff and start over when nothing wants to work correctly. Please help before I teach my tower to fly.

When I try to restart from the apple menu or the sys prefs the menu bar goes away, the sundry icons go away and the dock goes away leaving me looking at my desktop picture. But nothing happens after that. It just sits there being a very expensive picture viewer. I recently installed Tiger on both my internal and external hard drives; but since the sys prefs restart won't work then I can't change my startup disk either. I need to be able to use the external for some activities requiring transfer of old OS 9 files since I still can't get OS 9 to start on the internal and can't, now, try to work it from the external because the restart button won't work. I was going to archive and install Tiger on the internal but there wasn't enough room. I would wipe the internal if I was sure I could start from the external but am becoming dubious about that also. It is hard to save my stuff and start over when nothing wants to work correctly. Please help before I teach my tower to fly.

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