Hi @bigmike67 ,
Try operating the TV using the TV Control panel and see that how goes.
Here’s a link to the user manual that will help. See p.14 in the manual to view the controls and their location.
Once the TV has been turned on using the Power button, check if you get a menu being displayed on the screen when you press the Menu button.
If you don’t and if there is sound coming from the TV speakers then most probably it is a mainboard problem as you said before that the screen was white.
If you do then that is a good start as it proves that the screen is OK and that the connection from the mainboard to the screen is OK and lastly that the mainboard is OK up to a point as the menus are stored on the mainboard.
If there is no TV picture (as opposed to a menu screen) what is the signal source for the TV, an antenna or a box e.g. cable box, firestick or other media streaming device, pvr etc?
If it is an antenna then the problem is in the TV, again most likely the mainboard.
If it is a “box” then you have first have to prove whether the problem is in the “box” or the TV by connecting another signal source e.g. a dvd player and see if that works OK or not.
Using the TV control button will let you select most things that a remote would. It is just harder as you have to press the Vol. buttons to navigate through the settings.
Hopefully a start
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