Hi,

I had exactly the same problem, no code could be found. I solved this problem by bying a: "One for All" remote, which is a learning remote. By following the instructions, (which are easy), you place the original BenQ TV remote face to face with the One for All remote, and you can transfer all the necessary buttons to this All for One remote. You can also control all your other remotes.
Good Luck.

I phoned BenQ and there is no code for this TV. What that means is , I don't know.