These models experienced numerous changes to its motherboard design throughout its life; mainly to improve manufacturing efficiencies, but also to correct bugs from previous boards. Another issue was with the Spectrum's power supply. In March 1983, Sinclair issued an urgent recall warning for all owners of models bought after 1 January 1983. Plugs with a non-textured surface were at risk of causing shock, and were asked to be sent back to a warehouse in Cambridgeshire which would supply a replacement within 48 hours.
These models experienced numerous changes to its motherboard design throughout its life; mainly to improve manufacturing efficiencies, but also to correct bugs from previous boards. Another issue was with the Spectrum's power supply. .In March 1983, Sinclair issued an urgent recall warning for all owners of models bought after 1 January 1983. ?Plugs wit,h a non-textured surface were at risk of causing shock, and were asked to be sent back. to a warehouse in Cambridgeshire which would supply a replacement within 48 hours.