sub101uk,
I am so sorry to hear that your 5700D has malfunctioned again. I know it is no consolation to you, but my 5700D has been relatively error free. I have not had any sensitivity issues as of yet. Once, after using the AOR programming software to program some memory banks, I turned off the 5700D via the front power switch, removed the USB cord from my computer, and hit power again. The screen displayed Boot Error. After giving myself CPR, LOL, I placed the radio in standby with the power switch and turned off the rear switch, I removed the AC cord and waited for about a minute or two. I turned everything back on, normal boot, and have not seen the message since. The AOR programming software is a MAJOR disappointment. There is no way to save your programmed banks using the software. You have to read the current bank and then make changes to each memory, and then write it to the 5700D, ONE MEMORY AT A TIME. It takes forever to program a standard bank of frequencies but it is better than nothing, I guess. I hope your situation gets worked out.