Need advice from Engineers who are also TI users

[Hlib]

(01-26-2019 09:51 PM)pier4r Wrote:  Due to what the 50g died? I am interested!

At first, 50g srarted to turn off unpredictably during operation, batteries were new. Then, following the auto-power-on cycle every 4 days (http://www.hpmuseum.org/forum/thread-7334.html), sometimes he didn't turn off and kept draining batteries at full throttle without switching the LCD. I discovered this fault after a while. Similar behavior was sometimes also observed during normal [RS] [OFF]. Later, 50g stopped seeing the SD card. One day I couldn't turn 50g on at all even with USB adapter.
I could write about my other faulty hp-calcs (once I did it in this forum due to 39gii), but it doesn't make sence. To pay $400 including delivery for 4 NIB calculators and in five years not to have any serviceable is very expensive entertainment. These circumstances forced me to TI.