I had some serious trouble with my S900/Pulsar with Formac G3/400 
which involved the screen not showing properly so I took it to a guy 
who is very trustworthy and is an old timer on Macs but little 
experience with Umax. He managed to get the machine working but only 
by replacing the original Ati video card (marked mach64-VR) with a 
Formac GA6.

Problem is now it will only work when I set the startup to be the 
volume with OS8.1 whereas I was running perfectly happily with 9.1 
before the saga started (a month ago now!).

The system will boot from OS9.1 but only with Extensions off. If I 
don't hold the Shift key down during boot the Welcome to Mac OS shows 
a few Extension icons  and then the screen goes gray and starts 
flashing gray to dark gray.

I can get back from this by the three-fingered reboot command and 
quickly doing option-command-P-R to zap PRAM a few cycles and then 
holding shift to boot into OS9.1 with the Extensions off and then 
reverting to OS8.1...


I thought I'd start trying to track down what extension was doing the 
damage, so I unselected all extensions in OS9.1 but it still showed 
some icons and started flashing. Do I have to uncheck all control 
panels as well?

Does anyone have any ideas about this?

I'm beginning to lose my hair!


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