K1C toolhead PCBA replacement issues / stuck at firrst time startup

Greetings All

i have recently had a PCBA toolhead board go bad on me (psu short circet) due to this i had to replace both the main board and the tool head board , upon power up of the new bards the printer gets stuck at the self test section of first time setup .

i have been in contact with Creality support and they asked me to try the “debugmode_JumpSelftest” usb stick trick but it did not skip it .

is there anyone else that has got this problem ?

printer is a K1c 2025 , mainboard is the stock replacement , PCBA toolhead board went from the original to the “upgrade” one as that’s what is available

am i at the point i need to use the recovery tool and the latest firmware to get the new PCBA to work ?
is there anywhere that sells the original PCBA board (single layer pcb)?

all help is appreciated