On Tuesday, October 1, 2002, at 06:23 PM, Bryce Lee wrote:

> One "dual port"  would power the keyboard and mouse, the other port 
> would
> go to the printer.
>  These would be powered from the split USB port. The other port would 
> go
> to the LaCie CD burner.

A USB hub is a "splitter".   Some peripherals do have timing issues, 
though.  My scanner would sometimes fail to be recognized when attached 
to my USB hub.  The manufacturer insisted that the scanner needed to be 
connected directly to the iMac, but the problem was corrected by moving 
the scanner USB cable to the first port on the hub.  My Zip drive, CD 
burner, flash card reader, and laser printer don't seem to mind which 
port they get.

> -- snip --
> Hence I need to plug the printer into its own slot, and the keyboard 
> into
> its own slot and in theory the CD burner into its own slot.
> That's for a total of three USB slots required...
>
> BTW Have tried a proper all ports powered (4-port hub) and run the disc
> burner and the printer into same. Neither work, nor
> are recognized by the computer. Seems the CD burner has to go into its
> own slot on the iMac, ditto for the printer.
>
> Bit of a qaundry eh?
>
> So maybe there is more "wrong with the my iMac than appears to the 
> naked eye.
>

That would be my guess, too.  Before you spend big bucks on hardware 
repairs (or replacement), you might want to convince yourself that you 
are using good quality USB cable -- staring with the cable between your 
iMac and first USB hub.  You might try another hub, too (we're getting 
to the point where you can't have too many hubs).

John at Wood-n-Shavings, Inc.
San Antonio, Texas



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