OxygenOS Blue dot on top left corner

  1. G_A.G._Gutiérrez_Xazb Cupcake Jan 11, 2019

    G_A.G._Gutiérrez_Xazb, Jan 11, 2019 :
    After a failing to install a new update and while rebooting. screen went black and showing a blue dot on top left corner. Never recover after this.
    Customer Service was contacted but no help was available.
    any recommendation or suggestion will be appreciate.
    Thank you.