It seems all three have escaped refrigirant. They all turn on, all buttons operate as expected, fans work, even compressors engage, but not enough cooling power to condence humidity. If you are comfortable (I'm not) installing schrader or piercing bullet valves and adding R410A refrigirant into them, about 2 oz each, they might start to work, in that case - take them for free of charge.
Car refrigerant R134A will not work for these as it is too low pressure to be used in these units.
Or get them for parts.
Let me know if you are interested and I will tell you where to get them.