Is your lipo fully charged?
Hate to ask but need to.
Have you seen the
smokestopper? I find it useful when I start digging for trouble with my soldering iron.
For the VTX to power you need a charged lipo, solid connection from the lipo to the PDB, a good PDB, and a solid connection from the PDB to the VTX. Can you check those connections and look for breaks or loose solder joints?
Does your VTX take full battery power (12V to 32V) or is there a voltage regulator or BEC on the PDB? If there is a component such as a BEC or step down regulator, look hard at how that component is connected to ensure it is not loose as a result of a crash.
If there are no such things and your VTX takes full voltage you can probably bypass the PDB by connecting the VTX to the main power pads or any other full power pad on the PDB.
Or just buy a new PDB.
@FDS is spot on with the cost and the tip about the VTX antenna.
Same rules apply for the ESC.
Again, I Highly recommend use of a smokestopper.