What would be the cause for dot matrix printer to print random character? this is can be happen at random time
how do you guys fix it? my printer model is Panasonic KX-P1131E. thanks in advance

uninstall and install the driver. remember to restart on both.
If its still the same its the printer mainboard. No you can't DIY or change the mainboard. Either send to shop for repair or buy new.

yes try update driver and also try another computer too.

usually its due to font/language/keyboard difference

Restart the affected computer usually fixed mine. Reattached cable too if you are using parallel.

Possible driver causing this issue

thanks guys.. I also thought about the driver as well

update driver on device manager right if i'm not mistaken

I think so too.. because it's usually working just fine but there will be a day when this issue will occur

Where can I download the driver ea? all I site I want to download not found on server LOL

Sometimes restart the printer + print server to clear the memory helps too if multiple client is accessing the printer via print server.

print server as in the switch? restart the power right?

Your printer connected to a switch like device instead of PC? Is your print server in good condition? Mine had a bad capacitor before and my colleague went out to buy a replacement which dont work that well. In the end, I opened up the print server and replace the bad capacitor. It has not had a problem until now. We have been using it for more than 15 years.

Panasonic no longer has any support at all. Drivers only 3rd party sites.

cable kacau only.

yeah that's why the sites are not working.. any trusted 3rd party sites?

A lot of sites are sketchy but I found this one which seems legit
https://www.iet.com.hk/main/04_support_1131_p.html

also checked it in Windows Sandbox and Virustotal, seems clean
still though, proceed at own risk

OMG this is really helpful thankss