Renderer5444 Sounds like you didn't make it the bootloader interface (fastboot mode). Hold the power and volume down buttons until you get there. Once there you can reflash release.
It is important that you do not touch the tablet during the flashing process. The reason you're at the white screen is because you tried to boot the tablet without the OS having being flashed properly. If for whatever reason the flashing fails, you can simply restart the process from the web installer.