robb wrote:

well i tried the light bulb load ( using a 6v lantern flashlight
bulb) and using a lattern battery as power source.

Lucky that 6V is *just* acceptable.


i could not find anything warmed and the DMM milliAmp meter shows
~ 138 mA

i get ~438 mA when i disconnect the light bulb ???

You mean when you apply the battery directly to the 5V line ?


and the 8051 IC is the only thing that is warmed but no nore than
it warmed before the 32v rail mixing with the 5v

i do not know what this means , hopefully something good
robb

It means that the power consumption looks to be in the normal range.

Replace the 5V regulator (with a known good working one or test the one you have
but best a new one) and power the board up on AC (but with the power peripherals
unpowered - remove the fuse suppling power to those parts).

Graham