I have a friends XL 330 which he tried to update recently.
It now gets stuck at the TomTom logo when it powers up.
From holding down the power button for 20 seconds, I get the diagnostics screen which shows it has bootloader S5.5128
If I power it up while the USB is connected, it shows up as a drive letter and appears to have a full set of 8.410.1218 SE Navcore files. I can ...