What does tcu exception reset mean on my blackberry?

Answer 1

I offer this post with absolutely no warranty, claim of usefulness or obligation to indemnity of any kind whatsoever. The use you make of this information is entirely your own responsibility. Further, I urgently suggest that you do not attempt any procedure suggested in this post unless you are an accomplished and experienced electronic engineer with knowledge of and expertise with surfaced-mounted components. Finally, you should be acutely aware that performing any part of the suggested procedure will void any existing warranty that might apply to your unit.

My 7290 RIM Blackberry consistently displayed the TCU Exception message upon powering up. I "fixed" the unit with the following procedure. (Again, I do not claim that the same or similar procedure will in anyway improve your unit.)

1. Completely disassembled the unit.
2. Located the surface-mounted 1.3 Volt cell (battery) on the circuit board. (I tried to insert a pix of the circuit board, but with no avail.)

3 .Unsoldered and replaced the cell with a substitute cell salvaged from a defunct camera. (1.3 V Mercury-oxide cells are no longer readily available, having been prohibited from manufacture or sale almost everywhere in the world because of their toxicity. Further, efforts to locate an acceptable substitute which would conform to the constraints of the Blackberry have so far proved fruitless.)

4. Re-assembled the unit and successfully placed a test telephone call.