Front firewire 800 and 400 ports defective(Mac Pro 2.66 1st gen)

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Front firewire 800 and 400 ports defective(Mac Pro 2.66 1st gen)

I diagnosed my front firewire 800 and 400 ports are definitely bad. I tried resetting SMC and PRAM many times but didn't work. The rear firewires are working OK. Has anyone tried repairing this? I've noticed the front(firewire/USB) module circuit board can be repaired or replaced, could this be the problem? I also noticed there's 2 Texas Instruments chipsets(TSB82AA2 and TSB81BA3D) on the main logic board near the rear firewire ports, could this be the problem too? I have experience removing IC chips so it would be easy for me but I want to make sure which component is bad. Thanks.

Nathan

MacPro 2.66 Leopard 8GB, MacBook Pro 2.33 Leopard 4GB, Mac OS X (10.5.5)

Posted on Oct 6, 2008 9:31 PM

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Answer 1

Nov 25, 2008 4:46 PM in response to NathanS

Any fix for this?

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Answer 2

Dec 15, 2008 6:14 PM in response to NathanS

I've just developed the same problem this morning. I think my crime was to disconnect a bus powered disk from the front 800 port whilst the computer was sleeping - I thought I'd switched it off the night before. Rear ports work fine, disks mount, Avid Mojo connects, but I use the front ports a lot. If there is only a single firewire bus shared between the ports how can it make any sense for one side to go wrong? The front ports will still power a drive, they just won't mount it.

Anyone managed to correct a problem like this? Like Nathan I've zapped PRAM, reset SMCs, even just run the 10.5.6 updater which rather than solve the problem has disabled my bluetooth apple keyboard/mouse. Is there a route other than a logic board replacement?

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