When it doesn't not start, nothing happens when turning the ignition key?

My Grand Caravan has seemingly random intermittent starting problems. Sometimes it starts, and sometimes it doesn't. When it doesn't not start, nothing happens when turning the ignition key, not starter, not engine turnover - nothing. The next day, it may well start fine.

The van also has had several episodes where the instrument cluster completely goes out - all gauges - during driving. The van continues to operate during the instrument cluster failure, and eventually, they come back on.

I have had the ignition switch replaced 3 times, and also the controller, but the van still has the same issues.