Like I say I have had exactly the same thing as yourself red light doesn’t come on with the original charger or replacement charger. Absolutely nothing has worked so far. I’ve opened mine up and charged the lipo externally for 3 hours and the voltage is fine so it isn’t that I’ve looked at the cables but they all have glue on the connectors so they aren’t loose/unseated. I have bought a chip clip and will be attempting the bios flash as a last resort before this tablet goes in the bin
I would be very interested in knowing whether you manage to get it to even charge off the charger never mind actually turning it on!
Regards
Grant Gibson