The question was re the effect of unserviceable standby power for Cat 1 and Cat 2 Procedures wasn't it?
Using EASA regs the answer is simple and as follows;
Cat 3 and Cat 2. No effect.
Cat 2 OTS and CAT 1. Minima as for NALS.
OR, Did the OP mean having to operate using SBY Power for the ALS?
In which case;
Cat 3B No DH. No Effect
Cat 3B with DH and Cat 3A. Not allowed for DH above 50 feet.
Cat 2. Not Allowed
Cat 2 OTS and Cat 1. Minima as for NALS