Problems with Bravia 65X8509C tv turning on and off

[Beech25]

Have tried to re set to factory setting but no luck - TV has a logo Sony but only for a few seconds beore it switches off again - any ideas to get tv to work?

Thanks

[NRG117]

Same TV as mine. was you updating ?   if so what version from  and what version to ?

[Beech25]

TV was updated about 10 days ago but the probem occured as soon as tv was turned on