If you still struggling with the Alice PSU, I have full schematics.
There are a number of 20mm fuses inside the PSU.
If the 48v Phantom Power has failed, disconnect from the mains and check the fuse (F4 350mA) feeding the bridge rectifier.
The semiconductors in circuit are bipolar diodes Q14/Q15 (ZTX753), TIP31 (easily available), CA3140 MOSFET, etc.
If it is the Phantom Power, check all mic leads as a short may have damaged the circuit in the first place. The Mic channels also have jumpers on the PCB to switch power to input A or B, or off the phantom power to dynamic vocal mics.