I have an HP42S that works perfectly except for one small little problem... it draws a continuous 75mA of current. This will suck the batteries dry in about an hour. I have opened up the machine and can find no components that seem to be shorted, etc (i.e. all the caps are good). Same for the LED (disconnecting it did not change anything).
Measuring the resistance between the battery contacts shows a nice high resistance. Neither the CPU or RAM chip seem to have a temperature rise indicating that they are sucking the power. I have not removed the CPU card yet to check if the LCD is the problem. Does anybody have any idea where my juice is flowing?