Parts/Service for CELSIUS M450/440

The manual provides instructions on opening and closing the housing of the CELSIUS M450/440 system, as well as detailed procedures for replacing various components. These include fans, ventilation ducts, power supplies, boards, hard disk drives, memory modules, and the lithium battery. Specific steps involve detaching screws, levers, and cables, and carefully reassembling components while ensuring proper connections and seating. Safety precautions, such as disconnecting power and handling static-sensitive devices, are emphasized throughout the manual.