VAX 11/750 power supply fault

All, On 29/11/2007, J Blaser <oldcpu2 at rogerwilco.org> wrote: [Description of 2.5V rail power supply fault.] Firstly, I have never used an 11/750 so I am offering some general advice and assuming a linear PSU with overvoltage crowbar circuit. Firstly, no smoke after power on, you have to be happy about that, and at least some life! If you have a reasonably accurate voltmeter of sorts, what are the actual voltages the power supply is producing? So far it is not clear if the fault is with the voltage generation or detection circuits in the power supplies. Thanks. Simon -- ------------------------------------------------------------------------ "Well, an engineer is not concerned with the truth; that is left to philosophers and theologians: the prime concern of an engineer is the utility of the final product." Lectures on the Electrical Properties of Materials, L.Solymar, D.Walsh