JBL AVR 101 SMPS Troubleshoot

Hello Everyone, i am new to this forum as well as audio repair. This is my first time trying to troubleshoot and if possible than repair my AVR myself. My AVR power led start blinking when I switch it on. I have removed the SMPS and checked the voltages. I am getting only +/-22V which is supposed to be +/-45V. All other voltages are ok. +/-45V goes to AMP pcb. I have visually inspected the SMPS pcb but I could not find any problem. Can you guys please suggest what can be the problem in this case? If required i can share schematic of SMPS. Thanks.