Hi and welcome to JustAnswer,

Initially, the described problem with the Proview 3200 PA-32JK1A would indicate a most likely power supply problem. While this could be nothing but a loose connection or a cold solder, it could also be caused by failure of the power supply to fully turn on or to shut down immediately:

• auto-protect has kicked in to prevent further damage;
• a component or any of the boards being supplied has developed a fault over-loading the power supply;
• the power supply itself has faulted and could not produce sufficient voltage to operate the unit.

• consider a DIY (do-it-yourself) repair if and only if comfortable working with electronic components & circuitry, use of a DVM/VOM, a soldering iron/station and safe practices with electrically powered devices. Access to a Service Manual or at the very least, a schematic diagram would be a necessity;
• should you be uncomfortable with a DIY, perhaps your best bet would then be to consult with and/or seek the services of an authorized Service Center or a qualified professional.