I have another T725 that had a known good bios, so I used a ch341a and flashed the bricked one over with it's. The chips I flashed were W25Q32FVSIQ, and W25Q64FVSIQ . Still just a flash from the batt lights when going from no power source to either battery or power supply.
I inquired with a local smd repair specialist and he thought that it might be the EC chip. Unfortunately there is not one boardview for this motherboard I have found to date and not much information otherwise. Does anyone know where the EC chip is located or its chip name?