I have installed all drivers for all network cards, and Apple's TCP/IP is 
installed by default in both Mac OS 8.5 and 9.1. I have connected this 
misbehaving Mac to modern 10/100 ethernet switches and hubs, older 
10-base-T hubs, and to another older Mac via a crossover ethernet cable. In 
all instances, all OSes patently refuse to see an ethernet card of any kind 
in this machine. I am nearly convinced the logic board is somehow goofed 
up, but still hold out hope that just maybe, the dead PRAM battery is the 
culprit. Help? :P




On Saturday, 9 December 2017 01:49:10 UTC-6, Gary Satterfield wrote:
>
> I have a Power Mac 6500/275 that absolutely refuses to connect to anything 
> via ethernet. I connect it via cat-5 cable from this Mac's onboard, 
> Apple-supplied PCI ethernet card to a switch, and it will never obtain an 
> IP address. I have tried Mac OS 8.5 and 9.1 with no luck whatsoever. I used 
> OS 9 helper to upgrade it to Mac OS 9.2 but still no joy. TCP/IP and 
> AppleTalk do not even see an ethernet card in this machine. I have used 
> Apple's LocalTalk Switch, to no avail.
>
> Let's see what else I have done to this machine...
>
> I bought a new-in-a-shrink-wrapped-box Asante 10/100 PCI card to replace 
> the Apple card. No joy.
>
> I replaced the PCI Riser Card with a brand-new one. Nothing.
>
> I took the Comm Slot modem card out of it, as they are no longer supported 
> by Apple. Nada.
>
> I swapped PCI slots for the ethernet card. Nope.
>
> The only thing I have not done is replaced the logic board. This seems a 
> bridge too far. The lights on the back of both the Apple-branded PCI card 
> and the Asante PCI card light up when connected to either a switch or a 
> hub, but ethernet never works in TCP/IP or AppleTalk. There is no option to 
> select ethernet in TCP/IP or AppleTalk in ANY OS. I have zapped PRAM, swore 
> at it, sneezed on it, gave it the side eye as I held my mouth a certain 
> way, and pounded on it a couple of times.
>
> One thing I have not done is replace the PRAM battery. My training 
> suggests that a dead PRAM battery should not disable a PCI ethernet card on 
> this particular machine, though I would love to be proven wrong.
>
> This 6500 has a 6 GB hard drive, 96 MB RAM. I have also dug through the 
> 6400 Zone's vast knowledge about the quirks of this machine and the 6400. I 
> am at my wit's end.
>
> Any direction at all you kind folks can offer me would be much 
> appreciated. Thanks!
>

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