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echo: tech
to: CAROL SHENKENBERGER
from: WAYNE CHIRNSIDE
date: 2005-03-13 11:59:42
subject: Plz Listen to this

-> WC>-> Only conclusion I can draw - - you had the ribbon cable
from your CDROM
-> WC>-> drive plugged into the Promise card _backwards_ when you
observed the
-> WC>-> above noblink/noeject symptoms.

-> WC>It it IMPOSSIBLE to plug the cable in backwards as above.
-> WC>Not only visually inspected the mating connectors have plastic molded
-> WC>keys that prevent plugging them in backwards.

-> WC>Your "only conclusion" is WRONG.
-> WC>You just have to keep digging yourself in deeper
-> WC>don't you?

-> Wayne, no interest in ya'all's battle here but on older computers it is
-> quite possible to do what he has said.  For me, it's the floppy drive.

I'm aware of this.
I once misaligned leaving two pins outboard of an NEC IDE cable frying
the motherboard I/O.

However in the case of the H.P. not only is it impossible to do this
I put on magnifying glasses and verified pins 39 and 40.
Pins 1 and 2 markings were obscured by components.

-> I've plugged those ribbon cables in backwards a dozen times in the past.
-> The connectors *now* make it very hard or impossible.  That did not used
-> to be true.                                     

Never done that myself.

-> Here's a really neat trick!  Take an old computer (386 era) and swap out
-> the power supply then forget the 'balck meets black' rule and plug in
-> the leads backwards to the MB.  Now, also get the wires to the on'off
-> switch backwards.  This will isolate the fault to the pole outside your
-> house where you get to watch the guy come up with a truck, climb the
-> pole, and reset the breakers so your block has power again.  Really neat
-> trick!  
   
I know about AT black to black but am shocked your little PS
and whatever fuse or breaker behind it could have blown a 7200 volt
line distribution fuse. 

I think the lineman was having you on and you had an odd coincidence.

-> I was told not to try it again though for some odd reason.  Is
-> that fair I ask you?

An ex-employer once wired opposite phases of the 240 directly together.
The exploding transformer was impressive 
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