White Screens of Death on the V5 are caused by Electrostatic Discharge (ESD). The top suggested ways to prevent white screens are using anti-static spray on your field tiles, not having “floating metal” on your robot, and asking @Bob_Mimlitch_III nicely about why they haven’t added TVS diodes to the ports on the brain.
Until then, while practicing you can use BLRS’s ESD protection boards.
They are not competition-legal, but they can save your ports while practicing and help prevent white screens.