NEC AccuSync - Recent Questions, Troubleshooting & Support - Page 7

get the manufacturer of the speakers to be connected go on that web page , find a download suitable for that model and also suitable for the win operating system you have download then run the download see if that works

Sometimes this kind of problem dissappears after you update the firmware of the drive. Goto NEC support page online and search for firmware update for your make and model. There will be a little program to flash yhe firmware from your computer.
Good luck trying!!
A.Misset

Contact the vendor:
CRS System Sales Division 2909 Anthony Lane N.E. Minneapolis, Minnesota 55418 612/781-3474

Download the manual from https://www.manualslib.com/manual/297970/Nec-E313.html?page=2#manual

If you KNOW it is 5 volts then you only need to make sure that the amp is higher and never lower. Higher amp only means it can work without getting too hot. But the VOLTS MUST BE precise. For polarity it is MOST common to have the center pin PLUS and outer NEG/GND. When I fix laptops and put the powercord wrong nothing happens. When I get it right then lights go on on PC.

components starting to fail. unrepairable. buy a new one

Should be in settings under display

Get a new keyboard, and I would suggest wired so you are not constantly changing batteries.