Not all 1602 (or 16x2) LCD modules are 100% compatible with eachother. Most are, but I found this red one that blew up my ZXY6005 DC power supply. Turned out the LED backlight had 0 ohm resistors so no current limiting and the 100uH inductor on the PSU went up in smoke. Wound some new enamelled copper wire onto the ferrite and all is well.
...
https://www.youtube.com/watch?v=YzOBib89F0g