The part number on D23 crosses to nothing like it. It's just a Shottkey diode, it's not a Zener.
U1 is an MP2161GJ
Check that R16 (270k) and R18 (68K) aren't out of spec either.
Wouldn't hurt to test L2 if you can, 0.91uH, because something caused D23 to nuke. Then again, it could have just up and died all on it's own and everything else in there is fine.