Problem with a MESA 7i76

I currently don't have an oscilloscope. Is there any other way to check these outputs?

Measure the + and - outputs to ground with a voltmeter

Ok they are all constant to 5V.

Also you can check the outputs by verifying that they change state when LinuxCNC starts.

The + outputs should all be in the high state and - outputs all in a low state when LinuxCNC
is not running. When LinuxCNC is running (and idle) all of the + step outputs should be low
and all the - step outputs should be high.

If the + and - outputs are both at 5V relative to ground, then its likely the 7I76 has been damaged (or you are not reading the outputs correctly)

Hi everyone sorry for the delay, we have checked what you asked: for the TB2 the + and - outputs are all at 5V constant, so probably the board was damaged. Thanks again for all the fast feedback.