+1 to the PC should have auto-detected and used the correct refresh rate. I've seen more C= monitors damaged in shipment than anything else. Cold solder joints, dodgy connectors & cables, etc. All it takes is a few shakes in transit to dislodge something. That's why I no longer ship any old monitors. Take it to someone with experience repairing old TV's, etc. (high voltages inside!) and have them take a look inside it.
