Hey,
@DeDenker:
You don't have to replace the uboot. I work with stock Uboot.
But you need a way to access it, and there for a serial connection via UART is simply the best. The soldering is not a too hard task and by the way there are "ways" to do such a connection without soldering. Just a thought here: https://hackingecibfocusv2fubirevb.wordpress.com/2012/08/13/a-solder-free-uart-connection/
You might can go without UART, if you have ssh access to the vendors system you can change uboot settings form vendors linux system.
BUT: If something in the uboot is not right configured you need the serial connection, to fix this.
@all
I opend the KD20 month ago, and have not colsed it again. So I can't remember every step, but I used crossers pictures to see a way to open it, and it was not too hard.
As I see you have some issues with opening and uart I try to get a full SATA boot (uboot, kernel, uimage, rootfs from disk), and set the usb3.0 / cardreader issue back.
@DeDenker:
You don't have to replace the uboot. I work with stock Uboot.
But you need a way to access it, and there for a serial connection via UART is simply the best. The soldering is not a too hard task and by the way there are "ways" to do such a connection without soldering. Just a thought here: https://hackingecibfocusv2fubirevb.wordpress.com/2012/08/13/a-solder-free-uart-connection/
You might can go without UART, if you have ssh access to the vendors system you can change uboot settings form vendors linux system.
BUT: If something in the uboot is not right configured you need the serial connection, to fix this.
@all
I opend the KD20 month ago, and have not colsed it again. So I can't remember every step, but I used crossers pictures to see a way to open it, and it was not too hard.
As I see you have some issues with opening and uart I try to get a full SATA boot (uboot, kernel, uimage, rootfs from disk), and set the usb3.0 / cardreader issue back.