On Tue, Nov 30, 2010 at 8:47 PM, Dan <[email protected]> wrote:
> At 4:42 PM -0600 11/30/2010, Stephen Conrad wrote:
>
>> Twice in one day my G4 Quicksilver shut down
>>
>> Nov 30 16:21:45 steve-cs-power-mac-g4 kernel[0]: USBF: 721.937
>> AppleUSBOHCI[0x240b800]::Found a transaction which hasn't moved in 5 seconds
>> on bus 25, timing out!
>>
>> I see the USB part but I stopped using the 2 bad USB ports on my one Hub
>> and prior to this I had run the machine for over a week with no problems.
>>
>
> Disconnect that hub. Stop using it -- then see if the machine still has
> the problem.
>
> USB Hubs rarely have any sort of electrical protection *between* ports. If
> one port has gone bad (probably shorted) then at the minimum you now have a
> power leak, and if the power is leaking onto the wrong lines... Not good.
> Hubs are unintelligent connectors - like an electrical octopus. You
> wouldn't continue to use an octopus with a burned socket, would you?
What is truly sad is that it was the inland 4-port USB 2.0 Hub that went
bad.
I tried the Power Cord from that hub in the other one but no go
(A DC 7.5V 200mA cord. I was unsure of the output when I tried it. It is a
Model CNR-440).
When I switched the Hub from Bus-powered to Self-powered it was as if I had
disconnected all of the USB devices.
--
Steve Conrad
Henrietta, MO 64036
"The time has come for mankind to grow up and leave its cradle behind; to go
forth and claim our place in outer space."
- Capt. Henry Gloval
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(='.'=)
(")_(")
Help Bunny Take Over The World!
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