question

Have you tried connecting to the internal AP of the GX?

Removing power for 30 seconds or so for a full reset also sometimes helps.

When all else fails, the reset to factory is documented in the manual.

Cerbo access point is not up, is not found with Ethernet connection by victron connect using direct ethernet connection, likewise does not respond to venus.local over same connection, does not claim a dhcp address when connected to the local network.

Looks like a brick. What's the warranty period on these devices?

It appears to be stuck in a boot loop, and not loading new software from SD card....

Connecting to the device serial console, as per https://www.victronenergy.com/live/ccgx:root_access

confirms device is stuck in a boot loop, but can read the SD card.

relevant part of boot log reads:

[ 3.416831] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2)
[ 3.425263] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.10.33-venus-1 #1
[ 3.431953] Hardware name: Allwinner sun7i (A20) Family
[ 3.437201] [<c010d200>] (unwind_backtrace) from [<c010a3b0>] (show_stack+0x10/0x14)
[ 3.444942] [<c010a3b0>] (show_stack) from [<c0656500>] (dump_stack+0x98/0xac)
[ 3.452161] [<c0656500>] (dump_stack) from [<c06541e8>] (panic+0x114/0x30c)
[ 3.459122] [<c06541e8>] (panic) from [<c0901464>] (mount_block_root+0x2c0/0x340)
[ 3.466603] [<c0901464>] (mount_block_root) from [<c09016b0>] (prepare_namespace+0x154/0x190)
[ 3.475123] [<c09016b0>] (prepare_namespace) from [<c0658b00>] (kernel_init+0x8/0x118)
[ 3.483036] [<c0658b00>] (kernel_init) from [<c0100148>] (ret_from_fork+0x14/0x2c)
[ 3.490595] Exception stack(0xc0c4ffb0 to 0xc0c4fff8)
[ 3.495643] ffa0: 00000000 00000000 00000000 00000000
[ 3.503814] ffc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 3.511981] ffe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 3.518601] CPU0: stopping
[ 3.521313] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.33-venus-1 #1
[ 3.528005] Hardware name: Allwinner sun7i (A20) Family
[ 3.533232] [<c010d200>] (unwind_backtrace) from [<c010a3b0>] (show_stack+0x10/0x14)
[ 3.540969] [<c010a3b0>] (show_stack) from [<c0656500>] (dump_stack+0x98/0xac)
[ 3.548187] [<c0656500>] (dump_stack) from [<c010ba54>] (do_handle_IPI+0xf8/0x12c)
[ 3.555752] [<c010ba54>] (do_handle_IPI) from [<c010baa0>] (ipi_handler+0x18/0x20)
[ 3.563320] [<c010baa0>] (ipi_handler) from [<c016c7e8>] (generic_handle_irq+0x34/0x44)
[ 3.571321] [<c016c7e8>] (generic_handle_irq) from [<c016cdec>] (__handle_domain_irq+0x5c/0xb0)
[ 3.580015] [<c016cdec>] (__handle_domain_irq) from [<c03f17f8>] (gic_handle_irq+0x70/0x84)
[ 3.588362] [<c03f17f8>] (gic_handle_irq) from [<c0100b0c>] (__irq_svc+0x6c/0x90)
[ 3.595834] Exception stack(0xc0a01f10 to 0xc0a01f58)
[ 3.600882] 1f00: 00000000 00005cc4 ef79c804 c0118300
[ 3.609053] 1f20: c0a00000 00000000 c0a04f14 c0a04f50 00000000 c094c3e8 00000000 c0a01f70
[ 3.617221] 1f40: c0a03d40 c0a01f60 c01075f8 c01075fc 60000013 ffffffff
[ 3.623835] [<c0100b0c>] (__irq_svc) from [<c01075fc>] (arch_cpu_idle+0x38/0x3c)
[ 3.631228] [<c01075fc>] (arch_cpu_idle) from [<c065f428>] (default_idle_call+0x24/0x34)
[ 3.639316] [<c065f428>] (default_idle_call) from [<c014f088>] (do_idle+0x224/0x250)
[ 3.647058] [<c014f088>] (do_idle) from [<c014f380>] (cpu_startup_entry+0x18/0x1c)
[ 3.654624] [<c014f380>] (cpu_startup_entry) from [<c0900de4>] (start_kernel+0x488/0x4bc)
[ 3.662796] [<c0900de4>] (start_kernel) from [<00000000>] (0x0)

So it looks like the bootstrap code that can read the sd card isn't run. Guess this is probably cos the file system can't mount. Not sure where to go from here.

Hi @Mike Dorsett

To recover a seamingly bricked Cerbo GX or Cerbo GX MK2, follow the procedure explained here:

https://www.victronenergy.com/media/pg/Cerbo_GX/en/reset-to-factory-defaults-and-venus-os-reinstall.html#UUID-f26ec831-f79b-d493-00cb-d37ed8d74a74

(einstein and then .img.zip file)

Is there anything specific that happened or was done before your GX ended up in the state? It would be good for me to know; this doesn’t happen very often.