Please keep in mind that, in general, people only report "problems" and usually don't report not having problems.

How this gentleman solved his switch problems. The problems are demonstrated in the video.

He demonstrates a short or possible ground between switch SA and switch SB.

He demonstrates the while only rolling the scroll wheel clockwise, the onscreen cursor moves randomly up and down.

The author demonstrates that his T16 won't bind to a FlySky "compatible" receiver. (video no longer available, Feb. 24, 2020)

A scroll wheel problem is demonstrated.

He notes that the buttons are working but the scroll wheel is not. The tone of his voice shows his frustration with this brand-new T16. (video no longer available Feb 24, 2020)

This video demonstrates how to fix the "key stuck" problem.

s the scroll wheel is scrolled, the cursor randomly moves up and down. The same fellow posted another video on this issue that is linked below.

As the scroll wheel is scrolled, the cursor randomly moves up and down.

This video shows that no matter which direction the scroll wheel is moved, the cursor only moves in one direction.

He demonstrates a problem that he had with his right slider. I responded to his YouTube post and noted that I'd seen the same problem and had to redo the calibration a couple of times, and that fixed it.

The video shows the problem and he tells how he tried to fix it, but could not.

He demonstrates how to remove the rear of the transmitter and shows which ribbon cable he unplugged and plugged back in to fix this problem.

This video is not about a problem, but it shows a fix for many of the problems noted here. The video demonstrates how to reseat the ribbon cables that go to and from the various switches.

I'm not sure what he’s showing.

Appears that switch D (SD1) is not working.

The transmitter turns off when he tries to select Internal Module. He also notes that the external module will not seat correctly causing 5 pins not to connect.

Shows that his switches C & D are not working.

This is not really a problem, but informative if someone is confused about the two different bootloader programs in the T16. This video answers questions regarding the bootloader for both the multi-protocol module and OpenTX.

He demonstrates how to fix the "key stuck" warning message. This is an older version of the T16 with the external multi-protocol module.

He demonstrates a Hitec Optima not linking/working correctly in a helicopter. The receiver light is blinking in the video showing that it is not "Locked in".

His MDL button is not working. It opens the telemetry screen which opens the screen settings and the TELE button also opens the telemetry screen.

The PAGE button is not working.

This shows some flaky scroll wheel movements.

Jumper T16 MDL button behaves exactly like the TELE button. He is no longer able to edit or bind models.

He is having problems with the scroll button. He did a firmware upgrade and it did not solve the issue. Additionally he's getting an SD card error after the firmware update.

After the transmitter finishes firmware update, it will not turn on and will not power up in bootloader mode.

He shows how to flash with the CP210 adapter he made to flash the bootloader. This is not necessary with the Jumper T16 Pro version.
He notes in the video that OpenTx for the Jumper is not out yet and that there is no Companion computer software to work with the Jumper T16. That is no longer true.
IMPORTANT NOTE:
This is Josh's full time job. Please support him using his patron account, if you can.

Shows that it won't turn on. (video no longer available Feb 24, 2020)

Got it in August 2019. Plus version with Hall effect gimbals but still external module, but added internal module.
Return (RTN) button acting like the System (SYS) button. Lists, on screen, 7 things he did to try and fix it. He turned on the radio and gets the SD CARD WARNING. He notes that the button is working as he can clear the warning with it. NO USEFUL COMMENTS POSTED BY 7 AM ON DEC 2. MY THOUGHT - GET RID RID OF SD CARD WARNING.

Solves the not binding problem here. Has to use minus figure to start, not zero. Was mentioned in Grayson as well.

This may or may not solve the problem people were having binding FrSky receivers. It does in Europe.

This is their take on fine turning, especially the FrSky receivers.

Getting a lot of failsafes. Asks about if folks are getting a lot. Fine tuning? Demonstrates fine tuning.