Hello! Best way is have monitor shop or someone who repairs electronics fetched repair the lisa's power supply module. You can take it out as a unit from back after popping the back by hand. :) No screws needed. Nice! Better rebuild it with new capacitors and few semiconductors as needed to replace any burnt parts, the main switching transformer ever very rarely fail. No point to have a dead and a working power supply if it's so rare item! The cost of labor and components are not that much compared to overall of the value of this lisa, the LISA itself is very collectiable item! There's are two types of this power supplies. Jason D.