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820-3330-B no USB ports
- Thread starter Sr. Robot
- Start date
Not working USB 2 and 3 modes?
Check the series coils from data lines.
Check the series coils from data lines.
I plugged an old mouse and it works on both ports , so im guessing USB_EXTA_MUXED_F_N and USB_EXTA_MUXED_F_P lines are good?
L4700 and L4600 have no signs of damage. I dont know howto measure them to see if they are good. On diode mode they give me similar values to that of a working motherboard.
L4700 and L4600 have no signs of damage. I dont know howto measure them to see if they are good. On diode mode they give me similar values to that of a working motherboard.
So you have problems only with USB 3.0 mode.
Check L4710/20 and C4720/21 integrity.
USB ports connect with PCH.
Clean the contacts and check diode mode to ground at RX/TX data lines.
Check L4710/20 and C4720/21 integrity.
USB ports connect with PCH.
Clean the contacts and check diode mode to ground at RX/TX data lines.
Did you test with USB 3.0 pendrive?
Check diode mode on the PCH side of the series caps.
USB and SPI is not the same thing!
I was talking about something like C4720/21.
I was talking about something like C4720/21.
Disconnect RIO board and test only onboard left USB port.
Also try another macOS instalation.
Also try another macOS instalation.
Sorry, I was thinking to 3332 board.
Remove D4610/710, just in case.
Remove D4610/710, just in case.
Just remove the protection diodes, for test.
You're welcome!