Thanks for the reply man, but it seems as usual (for me) that it just isn't gonna be that easy this time.
Mine was a little different to access the service menu:
1. Turn the power off and set to stand-by mode
2. Press the remote buttons in this order : POWER OFF, MUTE, 1, 8, 2, POWER ON to turn the set on.
3. The set turns on and enters service mode.
I got into the service menu and managed to do a "blind" reset by pressing down 12 times (luckily the manual showed a picture of the menu screen) and then enter. It then went back into standby and now it does the gay little tone when turned on or off so I'm guessing that it reset but still has no video, menus, etc.
I ordered a new main board yesterday so hopefully I'll have it fixed next week. I'll have 30 days to return it incase I find something that can easily be fixed on the old board when I open it up.