FAQs & Troubleshooting

FAQs & Troubleshooting

What do the indicator lights on the printer mean?

There are two indicator lights on the printer: the Status light and the Charging light. Each indicator light shows the status of the printer as described below.



Status indicator light:


A blue or green light indicates the printer is operating correctly, while red indicates an error has occurred.

Indicator light color Indicator light status Printer status
Blue Constantly lit Waiting to receive data using Bluetooth® or the USB
Flashing Receiving data using Bluetooth
Flashing in long intervals Sleep mode (power-saving standby condition, possible only when receiving data using Bluetooth)
Green Constantly lit Waiting to receive data using USB
Flashing Receiving data using USB
Red Flashing An error has occurred.
Constantly lit A system error has occurred.


If an error has occurred, check for the following causes.

Error description Remedy
There is no paper cassette installed.
The paper cassette is installed facing the wrong directions.
There is no more paper in the cassette.
Correctly install a paper cassette containing paper.
A paper misfeed occurred. Remove the misfed paper.
A transmission error occurred. Check the transmission status.
An overheat error occurred. The inside of the printer has started to overheat. Wait until it cools down.


If a system error has occurred:
The printer may be damaged. Contact the sales representative where it was purchased.


Charging indicator light:
With the charging indicator light, the status of the power supply can be checked. The charging indicator light has two functions.


1. Checking the charging status (when the AC adapter is connected)

Indicator light color Indicator light status Printer status
Orange Constantly lit Charging
Off Finishing charging
Flashing Malfunctioning built-in battery


2. Checking the battery level (while running off the built-in Li-ion battery)

Indicator light status Battery level
Off More than 60% charged
Flashes once Less than 60% charged
Flashes twice Less than 30% charged
Flashes 3 times continuously Almost empty


When the indicator light starts flashing 3 times continuously, charge the battery.  Frequently recharging the battery will diminish its storage capacity. We recommend always waiting until the machine indicates that battery needs recharging before doing so. Refer to the FAQ: "How to prolong the life of your rechargeable battery".

If your question was not answered, have you checked other FAQs?

Have you checked the manuals?

If you need further assistance, please contact Brother customer service:

Related Models

MW-140BT, MW-145BT

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