I just got my 3.6 and It is replacing a different ARM board in a project. All the device does is read a bunch of I2C devices, a few GPS modules, and report it over serial and wireless. I tested it with a simple blink and Serial hello world program and it was fine (after a few unplugs and replugs since the serial port was not being found) Anyway I went to upload my program which ran on a different board and compiled fine and nothing. It took a long time to compile which is normal but uploaded as quickly as the two small test programs which was weird. One of the first lines in the code is the serial begin line and then shortly a test serial print. after it is done uploading, the teensy just sits there and blinks (My program does not use the LED) and does not create a serial port. I'm not sure what to do and I am getting relatively annoyed with it.

This is a teensy 3.6, teensyloader 1.32-beta2, arduino 1.6.13

Here is the verbose output:
Code:
20:37:28: Teensy Loader 1.32-beta2, begin program
20:37:28: File "OBDCU.ino.hex". 57948 bytes, 6% used
20:37:28: Listening for remote control on port 3149
20:37:28: initialized, showing main window
20:37:28: remote connection opened
20:37:28: remote cmd: "comment: Teensyduino 1.32-beta2 - WINDOWS (teensy_post_compile)"
20:37:28: remote cmd: "status"
20:37:28: status data sent
20:37:28: remote cmd: "dir:C:\Users\yandr\AppData\Local\Temp\arduino_build_333308\"
20:37:28: remote cmd: "file:OBDCU.ino.hex"
20:37:28: File "OBDCU.ino.hex". 57948 bytes, 6% used
20:37:28: remote cmd: "status"
20:37:28: status data sent
20:37:28: remote cmd: "auto:on"
20:37:28: remote connection closed
20:37:29: HID/win32:  vid:1B96 pid:0F06 ver:0004
20:37:29: HID/win32:  vid:1B96 pid:0F06 ver:0004
20:37:29: HID/win32:  vid:1B96 pid:0F06 ver:0004
20:37:29: HID/win32:  vid:0000 pid:0000 ver:0000
20:37:29: HID/win32:  vid:0000 pid:0000 ver:0000
20:37:29: HID/win32:  vid:045E pid:07E4 ver:0207
20:37:29: HID/win32:  vid:045E pid:07E4 ver:0207
20:37:29: HID/win32:  vid:045E pid:07E4 ver:0207
20:37:29: HID/win32:  vid:045E pid:07E4 ver:0207
20:37:29: HID/win32:  vid:045E pid:07E4 ver:0207
20:37:29: HID/win32:  vid:1B96 pid:0F06 ver:0004
20:37:29: HID/win32:  vid:045E pid:07E4 ver:0207
20:37:29: HID/win32:  vid:045E pid:07E4 ver:0207
20:37:29: HID/win32:  vid:1B96 pid:0F06 ver:0004
20:37:29: HID/win32:  vid:045E pid:0915 ver:0001
20:37:29: HID/win32:  vid:045E pid:0915 ver:0001
20:37:29: remote connection opened
20:37:29: remote cmd: "comment: Teensyduino 1.32-beta2 - WINDOWS (teensy_post_compile)"
20:37:29: remote cmd: "status"
20:37:29: status data sent
20:37:29: remote cmd: "dir:C:\Users\yandr\AppData\Local\Temp\arduino_build_333308\"
20:37:29: remote cmd: "file:OBDCU.ino.hex"
20:37:29: File "OBDCU.ino.hex". 57948 bytes, 6% used
20:37:29: remote cmd: "status"
20:37:29: status data sent
20:37:29: remote connection closed
20:37:29: remote connection opened
20:37:29: remote cmd: "comment: Teensyduino 1.32-beta2 - WINDOWS (teensy_reboot)"
20:37:29: remote cmd: "status"
20:37:29: status data sent
20:37:29: remote cmd: "status"
20:37:29: status data sent
20:37:29: remote cmd: "status"
20:37:29: status data sent
20:37:29: remote cmd: "status"
20:37:29: status data sent
20:37:29: remote cmd: "status"
20:37:29: status data sent
20:37:29: remote cmd: "status"
20:37:29: status data sent
20:37:29: remote cmd: "status"
20:37:29: status data sent
20:37:29: remote cmd: "status"
20:37:29: status data sent
20:37:29: remote cmd: "status"
20:37:29: status data sent
20:37:30: remote cmd: "status"
20:37:30: status data sent
20:37:30: remote cmd: "status"
20:37:30: status data sent
20:37:30: remote cmd: "status"
20:37:30: status data sent
20:37:30: remote cmd: "status"
20:37:30: status data sent
20:37:30: remote cmd: "status"
20:37:30: status data sent
20:37:30: remote cmd: "status"
20:37:30: status data sent
20:37:30: remote cmd: "status"
20:37:30: status data sent
20:37:30: remote cmd: "status"
20:37:30: status data sent
20:37:30: remote cmd: "status"
20:37:30: status data sent
20:37:30: remote cmd: "status"
20:37:30: status data sent
20:37:31: remote cmd: "status"
20:37:31: status data sent
20:37:31: remote cmd: "status"
20:37:31: status data sent
20:37:31: remote cmd: "status"
20:37:31: status data sent
20:37:31: remote cmd: "status"
20:37:31: status data sent
20:37:31: remote cmd: "status"
20:37:31: status data sent
20:37:31: remote cmd: "status"
20:37:31: status data sent
20:37:31: remote cmd: "status"
20:37:31: status data sent
20:37:31: remote cmd: "status"
20:37:31: status data sent
20:37:31: Device came online, code_size = 1048576
20:37:31: Board is: Teensy 3.6 (MK66FX1M0), version 1.03
20:37:31: File "OBDCU.ino.hex". 57948 bytes, 6% used
20:37:31: set background IMG_ONLINE
20:37:31: File "OBDCU.ino.hex". 57948 bytes, 6% used
20:37:31: elf size appears to be 1048576
20:37:31: elf binary data matches hex file
20:37:31: Code size from .elf file = 1048576
20:37:31: begin operation
20:37:31: remote cmd: "status"
20:37:31: status data sent
20:37:31: flash, block=0, bs=1024, auto=1
20:37:31: flash, block=1, bs=1024, auto=1
20:37:31: flash, block=2, bs=1024, auto=1
20:37:31: flash, block=3, bs=1024, auto=1
20:37:31: HID/win32: waiting for device
20:37:31: HID/win32: waiting for device
20:37:31: HID/win32: waiting for device
20:37:31: HID/win32: waiting for device
20:37:31: HID/win32: waiting for device
20:37:32: HID/win32: waiting for device
20:37:32: HID/win32: waiting for device
20:37:32: HID/win32: waiting for device
20:37:32: HID/win32: waiting for device
20:37:32: HID/win32: waiting for device
20:37:32: HID/win32: waiting for device
20:37:32: HID/win32: waiting for device
20:37:32: HID/win32: waiting for device
20:37:32: HID/win32: waiting for device
20:37:32: HID/win32: waiting for device
20:37:32: HID/win32: waiting for device
20:37:32: HID/win32: waiting for device
20:37:32: remote cmd: "status"
20:37:32: status data sent
20:37:32: flash, block=4, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=5, bs=1024, auto=1
20:37:32: flash, block=6, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=7, bs=1024, auto=1
20:37:32: flash, block=8, bs=1024, auto=1
20:37:32: flash, block=9, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: remote cmd: "status"
20:37:32: status data sent
20:37:32: flash, block=10, bs=1024, auto=1
20:37:32: flash, block=11, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=12, bs=1024, auto=1
20:37:32: flash, block=13, bs=1024, auto=1
20:37:32: flash, block=14, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=15, bs=1024, auto=1
20:37:32: flash, block=16, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: remote cmd: "status"
20:37:32: status data sent
20:37:32: flash, block=17, bs=1024, auto=1
20:37:32: flash, block=18, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=19, bs=1024, auto=1
20:37:32: flash, block=20, bs=1024, auto=1
20:37:32: flash, block=21, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=22, bs=1024, auto=1
20:37:32: flash, block=23, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: remote cmd: "status"
20:37:32: status data sent
20:37:32: flash, block=24, bs=1024, auto=1
20:37:32: flash, block=25, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=26, bs=1024, auto=1
20:37:32: flash, block=27, bs=1024, auto=1
20:37:32: flash, block=28, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=29, bs=1024, auto=1
20:37:32: flash, block=30, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: remote cmd: "status"
20:37:32: status data sent
20:37:32: flash, block=31, bs=1024, auto=1
20:37:32: flash, block=32, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=33, bs=1024, auto=1
20:37:32: flash, block=34, bs=1024, auto=1
20:37:32: flash, block=35, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=36, bs=1024, auto=1
20:37:32: flash, block=37, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: remote connection closed
20:37:32: flash, block=38, bs=1024, auto=1
20:37:32: flash, block=39, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=40, bs=1024, auto=1
20:37:32: flash, block=41, bs=1024, auto=1
20:37:32: flash, block=42, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=43, bs=1024, auto=1
20:37:32: flash, block=44, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=45, bs=1024, auto=1
20:37:32: flash, block=46, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=47, bs=1024, auto=1
20:37:32: flash, block=48, bs=1024, auto=1
20:37:32: flash, block=49, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=50, bs=1024, auto=1
20:37:32: flash, block=51, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=52, bs=1024, auto=1
20:37:32: flash, block=53, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=54, bs=1024, auto=1
20:37:32: flash, block=55, bs=1024, auto=1
20:37:32: HID/win32: waiting for device
20:37:32: flash, block=56, bs=1024, auto=1
20:37:32: sending reboot
20:37:32: begin wait_until_offline
20:37:32: offline, waited 2
20:37:32: end operation
20:37:32: set background IMG_REBOOT_OK
20:37:32: redraw timer set, image 14 to show for 1200 ms
20:37:32: HID/win32:  vid:1B96 pid:0F06 ver:0004
20:37:32: HID/win32:  vid:1B96 pid:0F06 ver:0004
20:37:32: HID/win32:  vid:1B96 pid:0F06 ver:0004
20:37:32: HID/win32:  vid:0000 pid:0000 ver:0000
20:37:32: HID/win32:  vid:0000 pid:0000 ver:0000
20:37:32: HID/win32:  vid:045E pid:07E4 ver:0207
20:37:32: HID/win32:  vid:045E pid:07E4 ver:0207
20:37:32: HID/win32:  vid:045E pid:07E4 ver:0207
20:37:32: HID/win32:  vid:045E pid:07E4 ver:0207
20:37:32: HID/win32:  vid:045E pid:07E4 ver:0207
20:37:32: HID/win32:  vid:1B96 pid:0F06 ver:0004
20:37:32: HID/win32:  vid:045E pid:07E4 ver:0207
20:37:32: HID/win32:  vid:045E pid:07E4 ver:0207
20:37:32: HID/win32:  vid:1B96 pid:0F06 ver:0004
20:37:32: HID/win32:  vid:045E pid:0915 ver:0001
20:37:32: HID/win32:  vid:045E pid:0915 ver:0001
20:37:33: redraw, image 9
20:37:35: Verbose Info event