Firmware encountered a problem - pc won’t recognise tablet

My tablet wasn’t switching on or going into recovery mode so tried following some online instructions to completely reset it but now I just have a permanent message on the tablet screen saying the firmware encountered a problem and to fix it using Kies - but my pc won’t recognise the tablet to open it in kies. I tried software using Odin which does recognise the tablet - but it keeps saying failed. What can I try or is my tablet caput?

Thanks for reading.

If a write constantly sails, it could be a bad motherboard (part f the eMMC storage failed permanently, and no one replaces chips, they replace the whole motherboard). It has to go to a repair shop, at least for a diagnosis.