Beware of Low Quality Capacitor

I once bought capacitors that have no names and manufacturer code. Only showing the microfarad and the volt. The value that i bought was 1 microfarad 450Volt. I replaced it in the monitor circuit and when i switch on the monitor it blow immediately. I thought there must be some other components that cause the capacitor to blow. After thoroughly check each and every components i found all components at the high voltage flyback transformer side to be in good condition. I began to suspect the capacitor that i have changed. Replacing with another working capacitor taken from another good working unit proof that the capacitor that i bought in fact all were defective. Time are wasted checking this kind of fault which is actually very simple. I immediately asked for a refund from the supplier. The supplier said they also didn't know that the capacitor was indeed defective. If you use Esr meter to check you will surely see the different. The good capacitor have a lower esr ohms range while the defective one have a higher ohms reading. Strangely the capacitance value for the good and the defective one are quite the same. In future if you want to buy capacitors please check if the manufacturer name is printed on the side of capacitor. If there is no logo or other code please go to next electronic shop to find capacitors that have a logo and name on it.