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I've measured those pins:

VIN - 5.01V
3.3V - 3.27V
Program - 3.25V while not pressed, 0.00V while pressed
Reset - always stays 0.11V

Sad :(

After the teensy.exe downloader window showed up and finished compiling, I pressed the button in my teensy, but it still remain silent. I tried several ways - tap, press and hold, reconnect then tap...

It didn't work...
I first hit Verify to compiled the example code AnalogReadSerial, and hold the reset button to upload. Then the message showed up just like before:

Opening Teensy Loader......

I got my black Teensy 3.1 about a month ago, and it worked pretty well, until yesterday. I plug my Teensy into my PC, but it didn't show up in the Device Manager. There's no COM port nor HID device...