I have a CASIO MT-240 that I use as a MIDI controller - works fine for me EXCEPT that the MT-240 has the quirky design feature of shutting itself off after a couple minutes if no keys are played. I find this totally aggravating! It even happens when an external power supply is used. How do I disable this battery-save feature so I can use the MIDI function when I am well into my songs?? I am well versed in circuitry and the soldering gun, etc... Show me in the schematic what trace to sever, where to solder, etc... whatever it takes to disable the time-out function and I will be very happy! I do NOT wish to "hit a key" every couple minutes to retain my settings. Thank you - Tom