beta bulleri for retrofit?

Hello everyone, I got this machine through an auction, it is in good physical condition, but with a controller that, even though I have the parameters, will not perform referencing, simply the switch that supplies power to the drivers will not stick if I hold the z axis, it goes up to the limit switch, turns off the drivers and an error axis error appears. The motors are dc servos with analog input for the drivers and have 500 pulse encoders. my question is whether the Mesa 7i96s+7i77 can satisfy that the motors remain and that the rack ATC will somehow work later. Thanks in advance for your future support.

I would try for sure to keep the motors and drives.
Does it have schematics?

there is a schematic but very weak, I can find out which cables are for encoders and analog inputs for drivers, which is enough to maybe tune the motors, but there are a lot of inputs and outputs of some inductive sensors and the like, so the schematic is a bit useless, I would have to see what activates what. I'm worried because maybe the switch for the drivers is faulty, (see the attached video) plus x, y don't move and I had to remove the driver for z because when I turn on the drivers and hold the z axis it goes up or down quickly.


youtube.com/shorts/p0F6iMwsQ_s?si=DSToSnipQkql-Ad2

There is a failed power supply somewhere, for sure, so start by checking voltages, usually they are marked on the boards.
And please, please do not do that "on-off-on-off" thing quickly, that is how machines are broken, give it 5 to 10 seconds between tests.
Edit,
upload schematic here so we can have a look.

I managed to change the parameter for the z axis to change the poles of the motor, I slightly reduced the trimmer for ``speed'' on the driver and now it wants to turn on the power for the drivers, all the lamps are green and the motors are energized and do not turn...however, according to the instructions, it asks for the first referencing, so anything else unfortunately throws an error and the referencing will not start, I will also have a screenshot tomorrow in pdf or image format of schematics, I guess I will have to to do a retrofit

1drv.ms/b/c/20de8062ade6d97a/Ea2GN4yTMoh...wX9UD_mh19g?e=RNUsN7

here is schematic, i have to find wires to pass controller end to enable drivers first before retrofit.

Sorry for the poor English, thanks for your help in the future.

I updated the firmware for 7i96s+7i77, I had to make a basic configuration on 7i92+7i77, then changed to ini 7i96s, does this work ok, the first thing I want is to attach encoders, however in hal it says 0 pwm generators if I change them to 6 I can't start linuxcnc.

I found encoder signals and attached z encoder linuxcnc reads nice with encoder scale -400, ballscrew is 5mm per revolution and encoders are 500 lines. now I have to connect the others and find a way to enable the drivers because they are all in the box, not each one individually.