Re: Apple IIgs' Failure at Random

[Rubywand <rubywand@swbell.net>]

Bryan Parkoff writes ...
> 
> Rubywand,
> 
>     Slot 0 is 16MB memory available.  One is 8MB for RAM and another one is
> 8MB for ROM.  It is the AE RAM Keeper card.
>     Slot 1 is Parallel Port controller card for printer.
>     Slot 2 is BlueDisk card, but it is turned off.
>     Slot 3 is Transwarp GS, but slot 3 is never used.
>     Slot 4 is Sound Wiring to stereo speaker, but slot 4 is never used.
>     Slot 5 is Super Drive card for 800K (GCR) and 1.44M (MFM)
>     Slot 6 is AE PC Transporter card.
>     Slot 7 is Turbo Card for hard drive.
> 
>     I suspect that each slot take too much power from power supply.  I use
> Vulcan power supply while Vulcan power supply's hard drive is connected to
> Turbo card (replaced Vulcan controller card).
>     AE PC Transporter has Math CoProcessor chip.  Math CoProcessor chip is
> very very hot like 200 degree temperature, but it has special flat heat
> sink.  Do you think that it causes the problem that it interferes between PC
> Transporter and motherboard?  PC Transporter is operating very well.

     The chip may normally run hot. Even so, getting some air moving across the
hot IC is probably a good idea. 

     Seems unlikely that the hot Math CoProcessor chip is causing the crashes,
especially if boot problems show up when the machine is first turned ON. 


>     Asterisk prompt appears at random time that can stop operating
> motherboard including PC Transporter and other devices.
 ....

     It may be that your power supply is too heavily loaded. The added load of
drives during boots, glitching on the Slot power bus, low noise margins, ...
could result in errors that might not affect the IIgs Self Test but could lead
to crashes in regular use.

     Does the IIgs boot okay with the PC Transporter board removed?



Rubywand