Added post about Hotel mode in TVs.

know-how/hacking/_posts/2017-09-26-tv-hotel-mode.md

@@ -0,0 +1,28 @@
+---
+title: TV Hotel Mode
+language: en
+layout: default
+created: 2017-09-26 14:25:43 +0200
+updated: 2017-09-26 14:25:43 +0200
+toc: true
+tags:
+  - know-how
+  - hacking
+  - tv
+  - television
+  - hotel
+  - hotelmode
+  - hidden
+  - menu
+---
+
+LG
+==
+
+1. Press and hold the <kbd>Settings</kbd> button on the remote (first, the menu appears and after
+   a few seconds it vanishes again and the channel id appears in the top left, that's when you
+   have to release the button)
+1. Type <kbd>1</kbd> <kbd>1</kbd> <kbd>0</kbd> <kbd>5</kbd>
+1. Press <kbd>OK</kbd>
+
+(If your remote doesn't have a <kbd>Settings</kbd> button, try <kbd>Menu</kbd> or <kbd>HOME</kbd>.)