What to check first of all in the switching power supply circuit after a short circuit in the output circuits?

Question

Siemens

Good day to all. Who dealt with the repair of industrial power supplies SIEMENS SITOP 220/24 VDC 5A, tell me what to check first of all for a malfunction, if under load the output is only 6 volts instead of 24. The reason for this was a decrease in the resistance of one of the consumers and an increase in current to 19 A. There is no visible damage to parts, no dust, no blackening, no swelling of electrolytes.
Thank you for attention.