no boot

[Ayman Altounji]

No boot
I had a perfectly working Prosignia 166 and an Intel P200.
Printed beside the switch bank 1 I found what seemed to be the right setting for a 200 MHz processor.
I then changed the processor according to the Maintenance and service guide, and set switch bank 1 accordingly.
The result was not as expected. The server will not boot. Both the CD-ROM and the hard drive spins up. The Caps Lock and Scroll Lock LEDs on the keyboard flashes once, then the Num Lock LED flashes once, then nothing. No video, and no further attempt to read from CD-ROM or HD.

I've tried to reverse my actions, but with no change.
What might be the problem?

Best regards