Turning on a HP 41 with the HP IL module plugged

[Sylvain Cote]

Check that the module contacts are clean and that they do connect correctly with the flex.
You may have a defective cable, a way to test this is to enter the following program and run it with a close loop.
Play with the cable to see if the tone stop or the beep interval becomes very long, if it is the case then you may have a semi-broken cable.

Code:

LBL "TSTIL"
LBL 01
AVIEW
TONE 0
GTO 01
END