Installing Linuxcnc on new pc Using Debian 12.13 and Linuxcnc 2.9.8 mesa 7i76eu

Before you start LinuxCNC, does red LED CR11 (above TB4) Illuminate?
 

no it never lights,
thanks

OK that means you have no VIN so the field I/O section is unpowered

Normally VIN comes from VFIELD (W1 LEFT)

So either you have:

1.  No VFIELD

2. W1 is in the right hand position (it should be in the default left position)

3. Some hardware issue with the field I/O section.

W1 is in the default position left and the fileld power is correctly conneced
Thanks
George

If you measure from
TB1 pin 8 (-) to TB1 PIN 5 (+)
 What do voltage do you get?

 

23.9v
Thanks