Help Please!

I have a luguna IQ with the Richauto A11 handheld and A1X-5 board. The controller has failed and I am curious about several things. Since I am new to having to learn cnc repair, I figured it to be in my best interest to seek real life suggestions...

Can a pc be connected directly to the A1X-5 parallel port to run a Mach product or will it only work with the A11 handheld?
Has anyone upgraded an IQ and if so, what motion control and software did you use?
Can any suggest a motion control board and software for general purpose hobby use?

Thanks in advance!

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