Switch v1 no TV / HDMI output

Nintendo Questions Nintendo Switch
1

Hi everybody,
my Switch V1 does not switch to TV mode when inside dock.
Things i’ve tested:

  • USB connection works without problems
  • charging works without and without dock
  • all USB connector pins are ok
  • tried another dock without succsess
  • all diode measurement values from the picture, dispite one value everything ok
  • measured the 4 resistors, ok
  • measured the 100nF caps, ok
  • 3.3 volt, ok

switch
switch1300×1007 253 KB

What else should i test? Any suggestions?

Best regards
Marxon

2

The line which has the odd value is MODE select (i2c/pin config) at the pi3usb. You can try and change the resistor. But my guess is that the pi3usb has an internal damage, which cause that wrong reading.
The fastest way to find out, would be changing the pi3usb for a new one.