wvmarle:
Wow, more than I ever expected! I thought your USB-TTL chip would be dead, so bypass that and power it directly. Then maybe you could rescue the ESP8266 chip.Your D5 pin is dead, very dead. If that's all, you're really lucky. I'd say disable it (on the physical level: cut off the pin from the PCB so you can't accidentally connect something to it and fry the rest), and just use the other pins.
I guess it is still usable, at least until I get another one, but it gets way too hot to use it in final project (my guess is that D5 internally shorted out), I never noticed, is it normal it to get hot? Plus I didn't check wireless part. Anyway, was fun to dig in to it, thanks for participating.
Last question: will ESP8266 ESP-07 (I need external antenna) chip work if I solder it on D1 mini board?