Backup memory write error. Settings could not be written to the backup memory on the main PCB.
Shown on Brother machines including 311H, 311HN, 341H, 342G, 430D, 430F, 430FX, 430HX, 438F, 6200A, 7000DD, 7100A and others.
What to check
- Switch the power off and on again; if it repeats, the main PCB is faulty.
Switch the machine off before touching any connector. If the code comes back after these checks, the fault is usually in the control boxes, PCBs and sensors.
Request a repair for this error or WhatsApp the code and your model to +91-9643480908 (Monday to Saturday, 10:00 AM to 8:00 PM (closed Sunday)).
Source
Summarised by Shankar Sewing from the S 7300A instruction manual (page 99); s7220d instruction manual (page 83); s7250a instruction manual (page 85); s7780a instruction manual (page 81); t8421d t8422d t8452d t8722 t8752d instruction manual (page 110). The manual has the complete procedure and connector numbers for your exact model.
Other Brother error codes
E010 Stop switch pressed in standby · E015 Stop switch held at power-on · E016 Stop switch connection fault · E050 Head tilted when the treadle was pressed · E051 Head tilted while sewing · E055 Machine head switch position · E065 Panel key stuck · E111 Needle-up stop position not reached · E130 Motor stopped / synchroniser fault · E131 Motor encoder signal fault · E132 Blown fuse on the motor PCB · E133 Motor PCB or upper-shaft motor fault · all Brother codes
Frequently asked questions
What does Brother error E440 mean?
Backup memory write error. Settings could not be written to the backup memory on the main PCB.
How do I fix Brother error E440?
Switch the power off and on again; if it repeats, the main PCB is faulty. If the code stays, the fault is usually in the control boxes, PCBs and sensors.
Which Brother machines show E440?
In the manuals we have read, E440 appears on 311H, 311HN, 341H, 342G, 430D, 430F, 430FX, 430HX, 438F, 6200A and other models.