> Can those faulty low ESR capacitors be replaced > by normal capacitors with exactly the same ratings? If they have the same rating, then what is the distinction between low ESR and "normal"? However you try to slice it, ESR and ripple current are important ratings for a switching power supply capacitor. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics