pn59d6500 firmware download?

[gmzombie]

so im trying to figure out how to get this firmware downgraded as i updated it before i read up on why not to update from samsung. so i have version 1018 and would like to get the older version as the update made my tv turn off even faster than before. i bought the tv from someone else knowing it turned off randomly. also the firmware is T-MST5AUSC-1018.0

[gmzombie]

Anybody?