E63 error in a Brother embroidery machine indicates that there is a problem with the connection to the touch screen panel. Here are some possible causes and solutions for E63 error:

1. Loose connection: Check if the ribbon cable connecting the touch screen panel to the machine’s circuit board is securely plugged in. If it’s loose, reconnect it firmly.
2. Damaged ribbon cable: If the ribbon cable is damaged, replace it with a new one.
3. Faulty touch screen panel: If the ribbon cable is in good condition and securely plugged in, but the error persists, then it’s likely that the touch screen panel is faulty. In this case, you may need to replace the touch screen panel.
4. Software issue: It’s possible that the E63 error is caused by a software issue. Try updating the machine’s software to see if the error disappears. If not, contact a professional technician for assistance.