Help confirming probable dead flyback diode
The diode appears to be a B260A schottky diode.  It is rated for 2 amperes and 60 volts peak reverse voltage.

You need to remove it from the circuit and test it.  You can't reliably check parts in circuit.

It is possible that the short is in another part.  As it is built, either the IC itself could be shorted, or there could be a short else where on the board.

To figure out what is broken, do this:


Remove the diode from the board and test it.  It should read about 0.3V on a diode tester in one direction and open circuit in the other direction.
If the diode is OK, remove the inductor from the board and measure the resistance between the diode pads on the board.
If you still have a short then the IC is bad.
If the short goes away when you remove the inductor then there's a problem else where on the board.  Finding that will be difficult.


You describe the inductor as getting hot.  That could mean the short is somewhere else.  If the chip were shorted or the diode were shorted then there'd be no current flow through the inductor, so it wouldn't get hot.

I almost expect you'll find the diode and the chip OK and that the problem is elsewhere.



You can test the diode by putting a blob of solder on one end.  Heat it until it melts, then use the point of your iron to push that end of the diode up.  Raise it a bit, then use the tip of your iron to remove the last bits of solder between the diode and the pad.