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Back of a graphics card PCB, the step down converter in Q501 has a leg missing (TSOT-23-8)

I have a faulty graphics card i am trying to repair, i noticed on the back near the 12v connector that a step down converter in Q501 had a leg missing (right side, second from the bottom) and i am not sure what the cause was (possible corrosion?).

I have a few questions regarding repairing this:

  1. What would be the easiest way to swap out the step down converter with a replacement.
  2. What is the space in Q505 for as it looks like a step down converter in the TSOT-23-8 package would fit.

The step down converter in question: https://www.mouser.co.uk/ProductDetail/Monolithic-Power-Systems-MPS/MP1475DJ-LF-P?qs=Iq7RKQRjpgoaxnjiXuhBAA%3D%3D

Any help would be greatly appreciated, Thankyou.

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    \$\begingroup\$ Nicely done photo - I wish thay were all that good. That's not "missing a leg" - it has been blown apart - presumably by electrical failure. There is a reasonable prospect that there is other damage. Datasheet here . Look for damage on lines connecting to pins 2 (input) and 3 (output ) BUT could be anywhere. | Cap equivalent to C2 in datasheet MAY be short. \$\endgroup\$
    – Russell McMahon ♦
    Commented Mar 27, 2020 at 6:46

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Nicely done photo - I wish tehy were all that good.

That's not "missing a leg" - it has been blown apart - presumably by electrical failure.

There is a reasonable prospect that there is other damage. Datasheet here.
Look for damage on lines connecting to pins 2 (input) and 3 (output) BUT could be anywhere.

The capacitor equivalent to C2 in datasheet MAY be short.

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