02-26-2004, 04:28 PM
My HP-37E works and look like new but even with brand new batteries, the red LED indicating low battery is always on. The calculator recently develop this problem after i dissambled the calculator and ressambled it. After i realize the problem, i open it again and clean every contact but always the false warning. All the display is crispy bright LED so i'm sure the calculator don't miss power. Can it be a discrete components one the power supply board? Which one? I remember someone here told me to ajust a small potentiometer on My HP-25 that has the same problem and it solve the problem but as i look on the 37E, no ajustement screw on this model...