1.5% of products which use STM32F107 totally dead after using 3 months;
The NRST reset not function. After disconnecting the power and connecting again, the chip could recover and work again. And this problem could not be reproduced in our lab condition.
Additional information: the chip use STANDBY mode to shut down and use WAKE UP pin back to work.
The schematic is attached below.(Only the core components displayed)