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So, the Brother ADS-2000 Printer has most likely suffered a power Surge.
In most cases the Power Supply (the AC to DC convertor) has been fried and needs to be replaced, and that is all you need to do to get the printer back up and working.
You can order replacements from Brother directly......or you can try to find one online on Ebay or something of that nature.
Although, in some cases, the printer does not use a convertor.
And in this case, the printer has to be replaced or repaired.
This printer is a discontinued model, and isnt being serviced anymore.
So, unfortunatley, if you are unable to get a new power supply (or this printer doesnt use a power supply) then you will need to purchase a new printer.