SamyGO

Hi.
Recently I purchased tv Samsung ue32j5100 and tried to change region on service menu (Option - Local_Set),
When I was leafing regions - Tv became frozen.
after that I disconnect power.
and after connecting power - Tv is on reboot loop after the boot logo appeared.

code "INFO? ?MENU? ?MUTE? ?POWER" doesn't work. I can't go to service menu.
code "MUTE ? ?2? ? 5? ? 8? ? EXIT" stops rebooting loop, but the screen is black every time.
what can I do more?

Use flashlight and check does tv screen is really black? Maybe lcd lights is off, but text is still visible if you use external light?