OP-1 will not boot to TE-Boot screen after holding COM before power up

My OP-1 works fine with the exception of no longer being able to get to the boot screen (TE-Boot) by holding the COM key down before powering up. I had successfully updated the OS before, and I still was able to do this. It just became impossible to do several months ago. TE wants me to send it to them and pay a $/Euro 40 fee to look at it aside from any parts or repair bill. Is this just the DSP board? It costs $120 as a spare part.