We have a ue40es8000 TV and it's been stored for a few years in a bedroom. When I tried to use it again, it works for a few mins but then clicks, with the picture disappearing being replaced my multi coloured thin vertical lines.
Hi @Gouldy This is a 2012 model and The latest firmware was released 2019 https://www.samsung.com/uk/support/model/UE40ES8000UXXU/ check connections are secure, could disconnect for around 5 minutes However I suspect if you do a Picture Test , Menu-Support-Self Diagnosis- Picture Test that may well reveal a Fault and if so likely to be the power Board. Repair would not be worthwhile in this case.
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB One Ui 5.1,Android 13 .