Scenario:

It supplies a steady 24 V dc to many components in the system.

However if the problem is intermittent, or it returns after the PSU was replaced, then without the right tools, finding the root cause can be a tedious task.

• The error-LED on the PSU is on. Is the problem the power supply, the input supply voltage or a load change on the demand side?
• Show me how to diagnose power supplies using a multimeter and a scope.
• View this video to find out more (.swf) »