Welcome aboard. Here are some links that you might find useful:
Form1 retro guide
openmachines.xyz
Unofficial Form1 wiki
OpenFL
You could try the laser spot test, but imo the best way to test a Form1 is to print something. That will tell you if your machine as laser or calibration issues.
This resin might still be good, check this thread. If you have black resin try that first and shake it before use. With OpenFL you have the option to adjust resin exposure profiles to tune the printing process for older resins.
Try cleaning with ethanol, you also have the option to renew the PDMS layer yourself.
Yes, but first get something like the finishing kit (2 containers filled with IPA to wash your parts). Post curing isn’t that important with the standard resins, while washing is.
Not one that i know of. But you can take a look at the peopoly moai forum, a sla printer very similar to the Form1.
Printing advice:
Resin prints best when it is warm (>=25 °C or 77 °F)
Resin handling:
I wear gloves (thick kitchen rubber gloves) and safety glasses when handling the resin to minimize the risk of developing a contact allergy. Also look out for propper ventilation because of IPA fumes and for some people the resin smell is pretty unplesant.
In my opinion it’s useful to think about waste management a litte. I put wipes that are saturated with resin into sunlight to cure the resin fully before i dispose them.