Salmoneous,
I, too, have a 7500. Allow me to help.
Obviously as noted earlier, you can use the keyboard to power it up. Depending on the model keyboard, there will be a single, large key with an odd shaped triangle pointing to the left. If you have an Apple Keyboard II (M0487), it's the large button next to the color Apple logo. If it's an Apple Keyboard I (M0116), again, it'll be the largest one at the top. Apple Extended Keyboard (M0115) will have the key at the top right corner, near the Caps Lock, Num Lock and Scroll Lock lights.
Regarding the power but no action, I've had this happen before and it occurs when the power management unit is corrupted, usually due to a dead or dying PRAM battery. Check that battery with a voltmeter; it should read 3.67 Volts DC or better. If less than 3.64, I would just replace it.
If it still doesn't startup, try powering up without the battery. If still nothing, I have a last resort:
1.) Unplug the 7500.
2.) Remove all the PCI cards installed (if there are any).
3.) Remove the RAM.
4.) Remove the VRAM.
5.) Remove the CPU card.
6.) Add power and turn it on for about 5 seconds, then shut it off.
7.) Add the CPU card, then step 6. If you hear what sounds like glass breaking from the internal speaker, you're almost home free.
8.) Add the VRAM, then step 6.
9.) Add the RAM, then step 6.
By the time you try steps 8 or 9, it should produce a normal startup tone.
10.) Add the PCI cards, then step 6.
The above procedure is kind of like giving the 7500 a defibrillator; step 7 indicates that the ROMs are alive. Once VRAM and RAM are added back in, now the 7500 can do something useful. Give it try and let me know how it works for you.
73s de Phreakout. :rambo:
I, too, have a 7500. Allow me to help.
Obviously as noted earlier, you can use the keyboard to power it up. Depending on the model keyboard, there will be a single, large key with an odd shaped triangle pointing to the left. If you have an Apple Keyboard II (M0487), it's the large button next to the color Apple logo. If it's an Apple Keyboard I (M0116), again, it'll be the largest one at the top. Apple Extended Keyboard (M0115) will have the key at the top right corner, near the Caps Lock, Num Lock and Scroll Lock lights.
Regarding the power but no action, I've had this happen before and it occurs when the power management unit is corrupted, usually due to a dead or dying PRAM battery. Check that battery with a voltmeter; it should read 3.67 Volts DC or better. If less than 3.64, I would just replace it.
If it still doesn't startup, try powering up without the battery. If still nothing, I have a last resort:
1.) Unplug the 7500.
2.) Remove all the PCI cards installed (if there are any).
3.) Remove the RAM.
4.) Remove the VRAM.
5.) Remove the CPU card.
6.) Add power and turn it on for about 5 seconds, then shut it off.
7.) Add the CPU card, then step 6. If you hear what sounds like glass breaking from the internal speaker, you're almost home free.
8.) Add the VRAM, then step 6.
9.) Add the RAM, then step 6.
By the time you try steps 8 or 9, it should produce a normal startup tone.
10.) Add the PCI cards, then step 6.
The above procedure is kind of like giving the 7500 a defibrillator; step 7 indicates that the ROMs are alive. Once VRAM and RAM are added back in, now the 7500 can do something useful. Give it try and let me know how it works for you.
73s de Phreakout. :rambo: