Protocol7,
I, too, have a 7500 and ran into the same issue. It has a Sonnet Crescendo G3 500 Mhz instead of a 601 or 604. It happened more frequently whenever the PRAM battery was dead or old. So that has one contributing factor.
The trick that works for me is shutdown the 7500, remove ALL PCI, RAM, VRAM, Processor card and battery from the logic board, then power it on and briefly push the CUDA button once. What this does is "shock" the logic board and reset it; kind of like using a heart defibrillator on a patient when needed. Next, unplug the power cord, reconnect the battery and processor card. Then, reattach the power plug and add VRAM. Finally, add back in the RAM and PCI card(s). Then try turning on the 7500 again and reset the PRAM (CMD + Option + P + R). If the normal startup tone plays while resetting the PRAM, you're good to go. Let it boot up and restore your control panel preferences.
So to recap, basically you'll be removing each piece of hardware and then adding them in until it boots normal. You will want to shock it before you add parts back in or even try shocking it after you put in the VRAM. Any combination should work. If not, keep at it until it boots.
Keep me posted as to success or not.
73s de Phreakout. :rambo:
I, too, have a 7500 and ran into the same issue. It has a Sonnet Crescendo G3 500 Mhz instead of a 601 or 604. It happened more frequently whenever the PRAM battery was dead or old. So that has one contributing factor.
The trick that works for me is shutdown the 7500, remove ALL PCI, RAM, VRAM, Processor card and battery from the logic board, then power it on and briefly push the CUDA button once. What this does is "shock" the logic board and reset it; kind of like using a heart defibrillator on a patient when needed. Next, unplug the power cord, reconnect the battery and processor card. Then, reattach the power plug and add VRAM. Finally, add back in the RAM and PCI card(s). Then try turning on the 7500 again and reset the PRAM (CMD + Option + P + R). If the normal startup tone plays while resetting the PRAM, you're good to go. Let it boot up and restore your control panel preferences.
So to recap, basically you'll be removing each piece of hardware and then adding them in until it boots normal. You will want to shock it before you add parts back in or even try shocking it after you put in the VRAM. Any combination should work. If not, keep at it until it boots.
Keep me posted as to success or not.
73s de Phreakout. :rambo: