HP-71b does not turn on when using batteries

[rprosperi]

(12-19-2016 09:11 AM)hpcalcuser83 Wrote:  I have a 71b that will not turn when using batteries. When I use an AC adapter it will power on fine. I checked the battery terminals and they are fine. I checked the DC voltage with a multimeter and it is fine until I place the last of the 4 batteries in such that it touches the terminal (4 batteries in line will measure 6 VDC until I insert the last battery an it touches the terminal - then the voltage measures 4 VDC or less). Anyone ever experience this?
-Gil

Is there any evidence of prior battery spill in the battery compartment? If so, there may be internal damage and/or a short that you can't see.

Are all 4 batteries known good, tested separately (voltage new s/b ~ 1.6V)?