LCD I2C QAPASS NOT WORK

HI ALL,
i found 2 type lcd i2c display:

  1. with marking QAPASS test with example coding "HELLO WORLD" = BLANK
  2. no marking test with "HELLO WORLD" = OK

QAPASS marking no R9 and no marking have R9

now anyone know how to use this QAPASS lcd?. i have 5 or 6pcs lcd like this.

PLS see photo

pls anyone can help..huhuhuhu

My guess would be that the backpacks are wired differently to the hd44780 display using different pin mappings so one works with the library you are using and one doesn't.
If you used my hd44780 library it will auto detect the pin mappings. It also includes a diagnostic to test the i2c signals and the backpack.
Run the diag tool and see what it says.