These two are the usual culprits. Repaired a couple now. Both times these were changed one worked fine and the other needed a transistor as well.
These are the RS order codes for the bits you need.
TPS62000 462-3714 £2.89 each U24
LTS3411 506-1842 £4.67 each U25
The board has the part numbers (u24, u25, etc) printed on it.