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PPC 7500: Not Booting after Battery Change

Message #1 - Posted 2004/03/01 - Fritz

I opened my seldom running PPC 7500 for a battery change. I kept the PPC open for 2 weeks during the time to search for that type of battery. Now I inserted a new Battery of the correct type, but my PPC doesn¥t boot anymore.
After turning on power you hear the HD trying to start, the LEDs on the keyboard flickers shortly, the screen remains black - and that¥s it.

Has anybody an idea, what happened during the time of battery replacement and how to solve this problem?

Thanks for your help.

Message #2 - Posted 2004/03/01 - OSTIAANTIC

<< I opened my seldom running PPC 7500 for a battery change. I kept the PPC open for 2 weeks during the time to search for that type of battery. Now I inserted a new Battery of the correct type, but my PPC doesn¥t boot anymore.
After turning on power you hear the HD trying to start, the LEDs on the keyboard flickers shortly, the screen remains black - and that¥s it.

Has anybody an idea, what happened during the time of battery replacement and how to solve this problem?

Thanks for your help.

Hi-
Make sure you put the battery in with the correct orientation. Press the CUDA switch on the logicboard for 3 seconds.
Then try restarting.

Ron

Ron

Message #3 - Posted 2004/03/03 - Fritz

What do you mean by "CUDA" switch - I¥m not aware of such a switch?

OSTIAANTIC wrote:

<< I opened my seldom running PPC 7500 for a battery change. I kept the PPC open for 2 weeks during the time to search for that type of battery. Now I inserted a new Battery of the correct type, but my PPC doesn¥t boot anymore.
After turning on power you hear the HD trying to start, the LEDs on the keyboard flickers shortly, the screen remains black - and that¥s it.

Has anybody an idea, what happened during the time of battery replacement and how to solve this problem?

Thanks for your help.

Hi-
Make sure you put the battery in with the correct orientation. Press the CUDA switch on the logicboard for 3 seconds.
Then try restarting.

Ron

Ron

Message #4 - Posted 2004/03/03 - Don Bruder

Previously, Fritz wrote:

What do you mean by "CUDA" switch - I?m not aware of such a switch?

Look about an inch, perhaps less, directly to the rear of the processor card slot, and almost exactly in line with the right (as you're looking at the machine from the front) edge of it. You may need to actually pull the processor card to be able to spot it the first time you go hunting for it. You should see a roughly 1/4 inch square gizmo. Usually it's black plastic, but may be metallic/silver. On top of this device you'll see either a red (most common), black (almost as common as red), or (rarely - I've only personally seen one) silver circle approximately 1/8 inch in diameter. That's the CUDA reset switch/button. Press and hold it for 5-10 seconds, and you've just performed a "CUDA Reset". This action is particularly important when swapping processor cards, but pretty much anything other than cable ends being plugged into or removed from the motherboard is sufficient cause to go ahead and hit it before trying to run the rig again.

OSTIAANTIC wrote:

<< I opened my seldom running PPC 7500 for a battery change. I kept the PPC open for 2 weeks during the time to search for that type of battery. Now I inserted a new Battery of the correct type, but my PPC doesn?t boot anymore.
After turning on power you hear the HD trying to start, the LEDs on the keyboard flickers shortly, the screen remains black - and that?s it.

Has anybody an idea, what happened during the time of battery replacement and how to solve this problem?

Thanks for your help.

Hi-
Make sure you put the battery in with the correct orientation. Press the CUDA switch on the logicboard for 3 seconds.
Then try restarting.

Ron

Ron

Don Bruder - dakidd@sonic.net - New Email policy in effect as of Feb. 21, 2004. I respond to Email as quick as humanly possible. If you Email me and get no response, see <http://www.sonic.net/~dakidd/main/contact.html> Short form: I'm trashing EVERYTHING that doesn't contain a password in the subject.

Message #5 - Posted 2004/03/03 - OSTIAANTIC

There is a small (and I mean small) rubber button, either red or black on the logic board. I think it's somewhere near the processor on the 7500. The processor daughtercard may block your view of it so look carefully on the motherboard at the base of the processor. The CUDA button is a reset button that should be pressed whenever you add something to the logicboard. You may need to use a wooden stick to reach it if it's hidden behind the processor. I use a chopstick for this. Many folks have reported the same problems with startup after changing the battery if they neglect to press the CUDA switch.

Ron

<< What do you mean by "CUDA" switch - I¥m not aware of such a switch?

OSTIAANTIC wrote:

<< I opened my seldom running PPC 7500 for a battery change. I kept the PPC open for 2 weeks during the time to search for that type of battery. Now I inserted a new Battery of the correct type, but my PPC doesn¥t boot anymore.
After turning on power you hear the HD trying to start, the LEDs on the keyboard flickers shortly, the screen remains black - and that¥s it.

Has anybody an idea, what happened during the time of battery replacement and how to solve this problem?

Thanks for your help.

Hi-
Make sure you put the battery in with the correct orientation. Press the CUDA switch on the logicboard for 3 seconds.
Then try restarting.

Ron

Ron

Message #6 - Posted 2004/03/03 - Noozer

"Fritz" <fritz@onlinehome.de> wrote in message news:4045F158.79CF4420@onlinehome.de...

What do you mean by "CUDA" switch - I¥m not aware of such a switch?

Some call it the PRAM reset button... Similar to the CMOS battery jumper on a PC.

If you've hit the right button, you'll notice that your time is out of whack... at least that's what it does on my PowerMac.

Message #7 - Posted 2004/03/03 - Don Bruder

Previously, Noozer wrote:

"Fritz" <fritz@onlinehome.de> wrote in message news:4045F158.79CF4420@onlinehome.de...

What do you mean by "CUDA" switch - I?m not aware of such a switch?

Some call it the PRAM reset button... Similar to the CMOS battery jumper on a PC.

If you've hit the right button, you'll notice that your time is out of whack... at least that's what it does on my PowerMac.

It'll also waste many bits of preference information that the finder (and a few other things) likes to park in the PRAM area - Almost everything that gets adjusted by the "General Controls" control panel, Mouse speed/click-rate, clock (as you mentioned, the time/date displayed, AND the format it's displayed in, or whether it's displayed at all), possibly desktop pictures/patterns depending on OS version, alert sounds, Appletalk networking settings may or may not go away, and so on. Nothing that's life-or-death critical, but it definitely does more than just the easily visible "clock's weird now".

Don Bruder - dakidd@sonic.net - New Email policy in effect as of Feb. 21, 2004. I respond to Email as quick as humanly possible. If you Email me and get no response, see <http://www.sonic.net/~dakidd/main/contact.html> Short form: I'm trashing EVERYTHING that doesn't contain a password in the subject.

Message #8 - Posted 2004/03/05 - Fritz

Thank you all for these really valluable hints.
Meanwhile I found the real problem. After pushing the CUDA switch I managed to restart the system in a propper way, but when I slightly wobble on the G3 processor card, the system freezes immediately. I thought this is an indication for loose contacts of the card to the mainboard, but with my old 601 card the system remains stable even if I heavily wobble the card.
Now I assume to have a weak solder dot on the G3 card or the card is broken somewhere.
Do I need a new processorcard, or do I have a chance to get it repaired?

Cheers.

Fritz wrote:

I opened my seldom running PPC 7500 for a battery change. I kept the PPC open for 2 weeks during the time to search for that type of battery. Now I inserted a new Battery of the correct type, but my PPC doesn¥t boot anymore.
After turning on power you hear the HD trying to start, the LEDs on the keyboard flickers shortly, the screen remains black - and that¥s it.

Has anybody an idea, what happened during the time of battery replacement and how to solve this problem?

Thanks for your help.

Message #9 - Posted 2004/03/05 - OSTIAANTIC

<< Thank you all for these really valluable hints. Meanwhile I found the real problem. After pushing the CUDA switch I managed to restart the system in a propper way, but when I slightly wobble on the G3 processor card, the system freezes immediately. I thought this is an indication for loose contacts of the card to the mainboard, but with my old 601 card the system remains stable even if I heavily wobble the card.
Now I assume to have a weak solder dot on the G3 card or the card is broken somewhere.
Do I need a new processorcard, or do I have a chance to get it repaired?

Cheers.

It may be a good idea to inspect and clean the contacts on the G3 card with alcohol and reinstall it. Does the card have any support up top when you fold down the plastic cover and the section with the power supply? Maybe that will be enough to hold the processor still.
I have no idea if it's possible to check for bad solder points on the card itself. It would probably cost as much or more to get it fixed than it would to replace the card. It shouldn't move once you get it working, as long as you don't bump into the Mac. I'd just try it for a while. It was working for you before.

hth
Ron

Message #10 - Posted 2004/03/05 - Don Bruder

Previously, OSTIAANTIC wrote:

<< Thank you all for these really valluable hints. Meanwhile I found the real problem. After pushing the CUDA switch I managed to restart the system in a propper way, but when I slightly wobble on the G3 processor card, the system freezes immediately. I thought this is an indication for loose contacts of the card to the mainboard, but with my old 601 card the system remains stable even if I heavily wobble the card.
Now I assume to have a weak solder dot on the G3 card or the card is broken somewhere.
Do I need a new processorcard, or do I have a chance to get it repaired?

Cheers.

It may be a good idea to inspect and clean the contacts on the G3 card with alcohol and reinstall it. Does the card have any support up top when you fold down the plastic cover and the section with the power supply? Maybe that will be enough to hold the processor still.
I have no idea if it's possible to check for bad solder points on the card itself. It would probably cost as much or more to get it fixed than it would to replace the card. It shouldn't move once you get it working, as long as you don't bump into the Mac. I'd just try it for a while. It was working for you before.

hth
Ron

Also, look for a crud buildup in the processor slot that might be mechanically preventing the card from being *TRULY* fully seated.

Don Bruder - dakidd@sonic.net - New Email policy in effect as of Feb. 21, 2004. I respond to Email as quick as humanly possible. If you Email me and get no response, see <http://www.sonic.net/~dakidd/main/contact.html> Short form: I'm trashing EVERYTHING that doesn't contain a password in the subject.

Message #11 - Posted 2004/03/08 - Fritz

Yeeeeeah - that was it!
after cleaning the contacts of the G3 card again very intensively the result now is as I dreamed of since days: the system is running in a stable mode again - so: problem solved.

Thank you very much for your guidance.
Best regards,
Fritz

Don Bruder wrote:

Previously, OSTIAANTIC wrote:

<< Thank you all for these really valluable hints. Meanwhile I found the real problem. After pushing the CUDA switch I managed to restart the system in a propper way, but when I slightly wobble on the G3 processor card, the system freezes immediately. I thought this is an indication for loose contacts of the card to the mainboard, but with my old 601 card the system remains stable even if I heavily wobble the card.
Now I assume to have a weak solder dot on the G3 card or the card is broken somewhere.
Do I need a new processorcard, or do I have a chance to get it repaired?

Cheers.

It may be a good idea to inspect and clean the contacts on the G3 card with alcohol and reinstall it. Does the card have any support up top when you fold down the plastic cover and the section with the power supply? Maybe that will be enough to hold the processor still.
I have no idea if it's possible to check for bad solder points on the card itself. It would probably cost as much or more to get it fixed than it would to replace the card. It shouldn't move once you get it working, as long as you don't bump into the Mac. I'd just try it for a while. It was working for you before.

hth
Ron

Also, look for a crud buildup in the processor slot that might be mechanically preventing the card from being *TRULY* fully seated.

--
Don Bruder - dakidd@sonic.net - New Email policy in effect as of Feb. 21, 2004. I respond to Email as quick as humanly possible. If you Email me and get no response, see <http://www.sonic.net/~dakidd/main/contact.html> Short form: I'm trashing EVERYTHING that doesn't contain a password in the subject.

Message #12 - Posted 2004/03/08 - Don Bruder

Previously, Fritz wrote:

Yeeeeeah - that was it!
after cleaning the contacts of the G3 card again very intensively the result now is as I dreamed of since days: the system is running in a stable mode again - so: problem solved.

Yay! Another 7500-series machine still kickin' it after all these years

) Doncha just love that box? :)

Don Bruder - dakidd@sonic.net - New Email policy in effect as of Feb. 21, 2004. I respond to Email as quick as humanly possible. If you Email me and get no response, see <http://www.sonic.net/~dakidd/main/contact.html> Short form: I'm trashing EVERYTHING that doesn't contain a password in the subject.

Message #13 - Posted 2004/03/08 - Daniel E. Sabath

Previously, Don Bruder wrote:

Previously, Fritz wrote:

Yeeeeeah - that was it!
after cleaning the contacts of the G3 card again very intensively the result now is as I dreamed of since days: the system is running in a stable mode again - so: problem solved.

Yay! Another 7500-series machine still kickin' it after all these years

) Doncha just love that box? :)

Totally. Mine is currently running Panther. Of course, the only remaining original equipment is the motherboard, CD-ROM drive, and (never used) floppy drive.

Dan

Daniel E. Sabath
University of Washington Department of Laboratory Medicine http://www.labmed.washington.edu

Message #14 - Posted 2004/03/08 - Don Bruder

Previously, Daniel E. Sabath wrote:

Previously, Don Bruder wrote:

Previously, Fritz wrote:

Yeeeeeah - that was it!
after cleaning the contacts of the G3 card again very intensively the result now is as I dreamed of since days: the system is running in a stable mode again - so: problem solved.

Yay! Another 7500-series machine still kickin' it after all these years

) Doncha just love that box? :)

Totally. Mine is currently running Panther. Of course, the only remaining original equipment is the motherboard, CD-ROM drive, and (never used) floppy drive.

Dan

That would describe mine, 'cept I'm still "in denial" when it comes to X. One of these days, I'm gonna stumble onto a cheap copy of X on eBay or something, and I'll give it a whirl, but for now, I'm quite cheerful about sticking with 9.1.

Don Bruder - dakidd@sonic.net - New Email policy in effect as of Feb. 21, 2004. I respond to Email as quick as humanly possible. If you Email me and get no response, see <http://www.sonic.net/~dakidd/main/contact.html> Short form: I'm trashing EVERYTHING that doesn't contain a password in the subject.

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