Working solution for Lexia PP2000 is no longer recognized on USB port
This post starts with user’s real problem on Lexia PP2000 that no the interface is no longer recognized on USB port, then followed by the analysis on this problem and working solution, as well as Trouble shooting Description. Hope it helps! The problem: When connecting to the USB port, the card is recognized and detected with USB com board driver. After flash spi flash (Winbond W25Q80B) for changing the serial number and flash MB90F546GS microprocessor with SCARY file for recognition in EVOLUTION driver; the interface is no longer recognized on USB port ????? After re-reading the SPI flash, this one is empty ??? Finally, I found the problem on this interface (more precisely on the microprocessor MB90F546GS board). Solution: Missing +Vcc on the pull-up resistor 3.9 Kohms, inner track probably cut ... Setting up a wire to bring the +Vcc on the pull-up resistor. Trouble shooting Description: After changing many components, among other SPI flash, HA86, Micro MB90F546GS .....