After a power outage, & surge when it came back on, it blew quite a few household items.
Luckily, it didnt affect my main PC, nor I thought the printers.
I only turned them on to check. They all lit up, so I assumed, not dead, must be working.
1/ Yesterday, I tried to print a letter on my Brother MFC 5840 CN (all-in-one). It didnt print typed text, but it did print the inserted shapes (horizontal line and box). It has new ink and did work.
2/ Strangely, when I tried to print the label on my Brother QL560, it just shoots blanks ! I think this is a thermal printer.
I didn't find the right solution from the internet.