Hello aguihan,
Your project work requires clear understanding of power supply topologies. I have design experience of different power supply converter and inverter topologies like buck, boost, buck-boost, cuck, multilevel. Considering the repair work, estimation is really very difficult. Some power supplies may not be repairable. Still, I will try my level best to repair maximum number of boards.
Hope you will find this bid in line with your requirement.
Regards,
ukshinde