LED Transformer teardown and repair - is it fixed?

LED Transformer teardown and repair - is it fixed?
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[@naynayeaves1342]

Thank you for such a helpful video

[@wimwiddershins]

If it's flicking on/off, it's often the switching chip reboot looping because its own little power supply is failing (small capacitor).

[@oluwasegunoladapoemmanuel3693]

100wt bulb driver giving out low voltage , can capacitor cause it

[@pa4tim]

Simple, measure the cap with a real LCR meter at 120 Hz, note the Dissipation factor stated as tan delta. Look up the datasheet, there they state the new DF and the "bad" value at 120 Hz. This is the only good way. ESR is not stated in the datasheets because DF is used for decenia and does a better job. ESR at 100 kHz is sometimes used in datasheet for SMD caps. In most datasheet nowadays they also state the impedance at 100 kHz. For bigger caps the reactance is very low so the impedance is for most made by the ESR. However, ESR is frequency depending and at 100 kHz big caps can be inductive instead (look up SRF, self resonance frequency) On average, a very rough estimation, the ESR is at its lowest value around 30 - 40 kHz but can vary wild because of the many sizes.

[@Mentski]

Rubbing his hands all over the caps like some kind of MAD LAD.

[@rhiantaylor3446]

I must admit I thought that was the only electrolytic cap on the line side of the regulator (i.e. after the rectifier and common mode filter inductor) and so I thought it would have 340v across it and, given that the replacement was rated at 50v, I rather expected it to go bang.

[@andreiciora2765]

Wath happened with your shugon t26