Salvageable Parts From A Bad UPS Board (4K)

My old UPS quit and I am looking it over to see what good electronic parts I can de-solder from it for my inventory.
WARNING: Information is offered "as is." Always use proper safety protection and procedures. Electricity always carries the risk of burns, fire, shock, electrocution, etc. Uninterruptible Power Supplies (UPS) can have dangerous and fatal voltages even when unplugged, even when the battery has been removed. If you do not know, learn first or do not do it!