ADC Studio Display problems

G9Girl

Registered
Hi, new here, but been using Macs since 85.

We just picked up a used 867 Quicksilver from one fellow and a used 17" ADC Studio Display from another. Both worked fine when purchased.

Had a small CRT plugged into the 867 and it worked fine. Still does.

When I plug the SD in, the 867 won't boot. The little red light (normally on when booted) on the motherboard flashes and the fans go on and off in concert with the light.

Any ideas on what's wrong?

Thanks

Shaun
 
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