Upon a friend's recommendation, I took my mysteriously deceased Canon Powershot to a tiny 5th floor place on Hankou St. near Ximen (w/all the camera shops).
Lanyang Camera Repair Center
Hankou Jie Sec 1 No 110 5F Rm 528.
Blue Japanese "RuRuBu" sign out front, but nothing for the camera shop itself.
They didn't speak any English, but they provided quick service at a cheaper rate than quotes from nearby shops ($1500NT - cash only. Fixed in 2 days). Handed me the battery, SD card & hand receipt upon drop-off. Sent me an SMS the next day w/cost estimate & had it fixed the day after that. Works fine now.