Booting a PowerWave 604|132.

I can see the original owner of this machine, after using it for a decade, being unable to answer any of your questions.

Mac users were never encouraged to fix their own machines.

RL

No direct experience with Mac clones, but all of my genuine Apple machines failed from capacitor leakage causing corrosion of the motherboards and eventual failure. How does the board(s) look under a close inspection? Solder joints can also fail from through-plating residue trapped in vias. Neither is likely but both are fixable if they can be seen.

Probing with a 'scope can't hurt, but you'll want some notion where to look for activity. Maybe near but not on a crystal? Without some sort of schematic it'll be a long search.

There are YouTube channels devoted to fixing vintage computers, some of those might be worth a look.

Good luck,

bob prohaska

You might visually inspect the motherboard to see if there are any signs of gross component damage.

pinholes in graphic processor chip bodies bulging electrolytic capacitors normal supply voltages/ripple (inspect power supply internally) loose connectors.

remove, clean and reseat anything in a socket.

try booting from a removable disc.

RL