I'd guess you are looking at a cap failure in the original PSU. 386 era is what, early 90s. 30+ years is a good run. If a replacement PSU doesn't have a switch, you could always hook it to a surge ...
TL;DR: Nintendo currently has no plans to raise Switch 2 prices despite a 40% increase in component costs due to global shortages. The company maintains strong profitability through Q3 2026 and will ...