The sentimental value is from the item not from the fact that it works

Anyway u can try your luck in Liang Court they repair alot of Japan-centric stuff. 2nd floor.
But generally I dun think people repair consoles anymore. Depending on your issue have u considered repairing it yourself? Check eBay and Amazon they might sell the part then there might be a Youtube video showing you how to fix it. This is what I did for my tablet, replacing the USB port.