B/W Revision B Motherboard problem - ehMac.ca
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Old Apr 7th, 2004, 08:25 AM   #1
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I bought a B/W Revision B motherboard off eBay - the seller says he'll guarantee it against D.O.A. so I'm sure it's a working motherboard but ....

When I installed it I can't get it to work!!

Before I take the seller up on his D.O.A guarantee I want to ask a few questions. He said that the board was "flashed" for a G4 chip (which I have - G4/500), I checked the jumper settings and they are set the same as the Revision A motherboard currently in my system - so everything there is right.

When I turn the system on with the Revision B board I don't get the "happy Mac chime" or the "bong" when it starts (the A board does) - what am I missing?

Please advise as I would really like to upgrade the board.
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Old Apr 7th, 2004, 08:42 AM   #2
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Make sure the processor is properly seated, check RAM and make sure the logic board is "plugged in." Check all cables and wires running to and from the logic board 3 more times as well. Right now it sounds to me like the logic board doesn't work, but it's hard to say.
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Old Apr 7th, 2004, 10:28 AM   #3
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I should have mentioned that I did recheck all connections - more than once and when I reinstalled the A board everything worked OK. I also tried numerous configurations of the installed items (memory, PCI cards, etc.) - all with no success.

The jumper settings were correct to the speed of my processor but does it make a difference if the CPU is a G4 or G3?
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Old Apr 7th, 2004, 11:02 AM   #4
 
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I would suggest to get back to the basics and put an original G3 CPU in the new board and see if it powers up properly. If it does not at that juncture, then something may have gone wrong with the so called "Flash"....

Funny, I upgraded my B&W G3 Rev B system to a G4/500 without having to "Flash" the board??? Interesting...


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Old Apr 7th, 2004, 11:14 AM   #5
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The seller just doesn't know what he's talking about. You don't flash any board to make a G4 ZIF work with it. He must of thought he did or something when he put a G4 ZIF in it and thought it got flashed in the process (which doesn't happen).
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Old Apr 7th, 2004, 01:05 PM   #6
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Once again, Lars doesn't know what he's talking about. B&W G3's have a G4 CPU block(placed there by Apple), that is removed by upgrading firmware-the Zif upgrade manufacturers usually supply this firmware upgrade. Jumper settings for the G3 and G4 upgrades are also likely different-the G4 Zifs often have jumper or dials on them as well. If you have already "flashed" your B&W for a G4 upgrade, the new 800, 1000 mhz upgrades require a new, different "flash".
In Simon's case, resetting the motherboard via the CUDA switch, or pulling battery, etc. may help. Check jumper settings, etc. Did/does the G4 zif work on the Rev. A board? Lots of info on various upgrades in B&W on Xlr8yourmac.com and online manuals can usually be found for most upgrade manufacturer's zifs. [img]smile.gif[/img]
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Old Apr 3rd, 2008, 10:12 PM   #7
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Same Problem

Hi, I've got the exact same problem, got my Rev B from eBay as well. Simon, who sold you the board? if it was macdealz, you might want to just take him up on the warranty, because that's who i got mine from, and mine doesn't work either, also just to make sure that my board isn't also defective, does the computer make the happy mac chime if the hard drive isn't working right? because my HD has been acting funny even with the Rev A.

Also my CPU is a G3.
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Old Apr 3rd, 2008, 11:21 PM   #8
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I never "flashed" my B&W when I upped it to a G4. I just had to install a control panel in the system. No firmware flash at all. Didn't change any jumpers either.

Man, I have to stop reading stuff on the web. It's aggravating.
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Old Apr 4th, 2008, 02:42 AM   #9
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Once again, Lars doesn't know what he's talking about. B&W G3's have a G4 CPU block(placed there by Apple), that is removed by upgrading firmware-the Zif upgrade manufacturers usually supply this firmware upgrade. Jumper settings for the G3 and G4 upgrades are also likely different-the G4 Zifs often have jumper or dials on them as well. If you have already "flashed" your B&W for a G4 upgrade, the new 800, 1000 mhz upgrades require a new, different "flash".
In Simon's case, resetting the motherboard via the CUDA switch, or pulling battery, etc. may help. Check jumper settings, etc. Did/does the G4 zif work on the Rev. A board? Lots of info on various upgrades in B&W on Xlr8yourmac.com and online manuals can usually be found for most upgrade manufacturer's zifs.
perfect.....


Things that go bump.....
Having the jumpers on backwards ....been there done that - happened to be working on the wrong side of the machine....

The original G3 chips will work once the firmware block is removed.

Carl - Apple pulled a nasty - IF you happened to upgrade to a G4 without going to the latest version of the OS then the block was not in place. Unusual circumstance tho.

Simon are you getting lights on the board?

You 100% that it is a Rev B???

Lots here for you

Installing OSX on your Blue and White G3



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Old Apr 4th, 2008, 08:48 AM   #10
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Holy back from the dead thread, dating to 2004...
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