I've just installed Android 4.0.3 ICS onto my Samsung Galaxy Note with 2.3.6. The installation was done by wifi via official installer. I did not download anything specifically, just got a popup with something like "Do you want to upgrade to 4.0.3?" After answering 'yes', it downloaded some files over wifi, and restarted the phone.
But the restart didn't go well. I can see the initial Samsung animation, but after that the text "Samsung" keeps flashing in the center of the screen and nothing happens. I left it for a couple of hours - no changes. I tried rebooting and even remove battery - the same thing, it does not boot. I have never rooted the device or replaced the ROM.
What can I do? How can I enter recovery mode or something? I tried to enter safe mode by tapping menu button while booting - didn't work.
Volume Up
+Home
+Power
buttons while turning the phone on should boot it into recovery mode, where as @svarog suggests you can do a wipe. – Chahk Jun 29 '12 at 17:33