Electronics > Repair
Trying to troubleshoot a main board with Rockchip RK3288 microprocessor
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domas.zelionis:
Hey,i am also trying to fix some issues on my Denon Prime4, as it is out of waranty and ticket with support did not bring me to resolution....anyway, its uses exactly the same motherboard. but the issue i currently facnig is that debug port only outputs data, it does not allow me to interrupt a boot or use login prompt after its boots....so just wondering did you needed to do anything special to get that working ?
as on u-boot i see input says
"In:    gpio-keys"
and only for out and err i have:
"Out:   serial,
 Err:   serial"

so just wonder is that same on your one and did input worked out of the box or you need to do something special to make it work ?

Thanks
Best regards,
Domas Zelionis

Castor troy:
Hi everyone
My board is in a headrush gigboard.
The debug port have 6 pins but none are spotted.
Someone could heplp me please?
tbegal:
6 Pin Serial Port Connection
carlitzt:
Hello everyone,

I know this threat is old, but do own a Headrush Pedalboard that also has the USB problem, so the device is not visible on my computer (nor Windows , nor Mac).

After reading the messages, I do have a question:

I am not an linux user, so I can not follow the output.

I studied electrical engineering, so I am good at hardware.

Would a solution be, to use one of the other usb ports of the board, to connect them to the computer?

Is the problem more a hardware type (usb driver chip is faulty) or is it more a software issue (new firmware update had a bug and disables usb transfer function)?

Any suggestions here?
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