#Took delivery of my HA Yellow PoE today
brave fern
Just tried two different PoE+ switches (just in case) and cables - no success there either 😫
past zephyr
Hooking up USB Serial (no output at all)
being a potential rma case, i'd wait for the nabucasa ppl, but if the bootloader is an older version setting BOOT_UART=1 in bootconf.txt and updating the bootloader might at least shed some light on whats happening in the 1st stage bootloader.
hushed geode
Have a look at the jumper JP2 (USB-C Rcvry) - it needs to be open.
https://yellow.home-assistant.io/faq/#my-home-assistant-yellow-lights-up-the-red-led-only-what-can-i-do
brave fern
@hushed geode Mine doesn't have a jumper, it has a momentary switch instead which will be open by default
hushed geode
If JP2 isn't a jumper anymore, it has to be a new PCB revision 🤔
latent crow
Yes, the jp2 jumper was replaced by a button
hushed geode
Might the JP2 button be stuck in closed position?
latent crow
It needs to be pressed to enter the USB rcvry mode, which was successful? By default if it was powered off and then on after flashing the emmc it would then not be active
@brave fern did you try the serial console connection after flashing?
brave fern
@latent crow yep, didn't work (no output). I just tried to reflash just now with BOOT_UART=1 but now it seems like the CM4's eMMC has died completely, so I suspect the CM4 is at fault, not the Yellow:
RPIBOOT: build-date Mar 27 2023 version 20221215~105525 ea2b2dec
Waiting for BCM2835/6/7/2711...
Loading embedded: bootcode4.bin
Sending bootcode.bin
Failed control transfer (-1,24)
Failed to write correct length, returned -1
Waiting for BCM2835/6/7/2711...
Is the CM4 correctly seated in its sockets?
brave fern
Yep