While an SE/30 can use a Desktop II or later ADB keyboard for input, it is not pseudo-soft power savvy as a Colour Classic is, ie it cannot use the power key on the keyboard for startup or shutdown.
The interrupt and reset switches both connect chosen points in the MLB circuitry to ground. If you get part of the expected result of pressing one of them, but not the whole result, it suggests an open circuit somewhere else. It is not beyond possibility that the open circuit is the result of a broken trace on the MLB, caused by the universal villain: leaked capacitor goo. If your SE/30's MLB has not already been reworked to replace its original capacitors, a thorough board wash followed by minute trace inspection and component replacement may be staring you in the face.
At the very least you should open the SE/30 to inspect the MLB for (1) the presence of modern tantalum electrolytic capacitors, mounted horizontally, or (2) the tell-tale smudges on the MLB surrounding one or more of the older aluminium electrolytic capacitors. In the words of trag, who keeps a supply of replacement capacitors for SE/30 owners, the faulty caps are those that look like little fuel tanks, mounted vertically.
These forums are stuffed full, pressed-down and running-over with discussions about capacitor leakage, so you will have no difficulty in getting info. about capacitor replacement.
de
The interrupt and reset switches both connect chosen points in the MLB circuitry to ground. If you get part of the expected result of pressing one of them, but not the whole result, it suggests an open circuit somewhere else. It is not beyond possibility that the open circuit is the result of a broken trace on the MLB, caused by the universal villain: leaked capacitor goo. If your SE/30's MLB has not already been reworked to replace its original capacitors, a thorough board wash followed by minute trace inspection and component replacement may be staring you in the face.
At the very least you should open the SE/30 to inspect the MLB for (1) the presence of modern tantalum electrolytic capacitors, mounted horizontally, or (2) the tell-tale smudges on the MLB surrounding one or more of the older aluminium electrolytic capacitors. In the words of trag, who keeps a supply of replacement capacitors for SE/30 owners, the faulty caps are those that look like little fuel tanks, mounted vertically.
These forums are stuffed full, pressed-down and running-over with discussions about capacitor leakage, so you will have no difficulty in getting info. about capacitor replacement.
de