On 02/05/2014 03:08 PM, Ian McLaughlin wrote: The best tool for repairing switching supplies (or monitors, for that matter) - an ESR meter. Out of all of the test gear I've purchased over the years, this one probably gets the most use! They use such a low voltage, you can usually use them in-circuit without having to desolder the component off the board before testing. Only takes a few minutes to go through a power supply and identify the suspect electrolytics. Agreed 100%. I use an HP 4276A for exactly that. -Dave -- Dave McGuire, AK4HZ New Kensington, PA