I have the following thermal printer that I used with my Arduino project, I guess something messed up in one of my wiring (I'm a beginner) and I believe I might damaged the control circuit of that printer.
The printer doesn't turn on anymore, even when I'm just connecting the Vin and GND connections.
It used to work also when I just provided power even without TX/RX connections.
I tried 5V and 9V power sources.. it was usually connected to 9V power source, but it wasn't that stable or I might accidentally wire wrong the TX/RX.
Now I'm stuck with this printer but can't power it on anymore and I'm looking for a spare circuit board so I can replace it.
Does anyone know where I can find such a spare part? I tried to Google some of the info written on the PCB but couldn't find..