The author acquired a Fujitsu FM Towns II computer, a 486-based machine with a mandatory CD-ROM drive, known for its multimedia capabilities. The power supply, a common point of failure for this model, exhibited issues, including leaking capacitors and a corroded resistor, leading to intermittent shutdowns. The author is troubleshooting the power supply, suspecting a soft-power issue related to the corroded resistor.

The author attempted to repair a faulty power supply by replacing a damaged resistor and other components. After encountering difficulties and realizing the complexity of the repair, they decided to build a new power supply using a PicoPSU and a Meanwell power supply. Despite encountering issues with the Meanwell’s size and the power button circuit, the author persisted and eventually succeeded in creating a functional power supply.

The author successfully replaced the power supply in an FM Towns IIHR computer. The new power supply, built using a Meanwell PSU and a custom board, was tested and found to be functional, although it powers on automatically. The author plans to address this issue and open-source the project on GitHub for others to build.