I bought a refurbished TSU3000 in 2006 as a backup. Recently my TSU2000 has been acting, turning on - off by itself and draining the batteries every two days or so, I took out TSU3000, recharged and keep getting a failed calibration. I have downloaded and updated the firmware from newest to oldest versions and back but never pass the calibration screen at any version of its firmware .
I want to open it up but there is no torx screw! I think it's glued since it's a refurbished. Anyone has a similar problem? how to open without breaking it...?
Any advise? Thanks much. An
(Lesson learned: use it when it's still in warranty!)