Lincoln picked up their first home points of the season by thrashing Mansfield 4-1.Three goals in 10 minutes either side of half-time did the damage during a defensive day to forget for the Stags.Mansfield did their cause no favours after conceding through a free header and two goalkeeping blunders.Christy Pym saved well to keep out a Tom Bayliss shot inside the opening 15 minutes.But the Stags keeper was at fault when he was beaten by Adam Jackson coming for a cross after 29 minutes.Paudie O’Connor hit the bar after a good turn as Lincoln kept up the pressure.And they doubled their lead when Pym made a mess of Sean Roughan’s inswinging free-kick in first-half stoppage-time.It was game over two minutes into the second half when an unmarked Jackson headed home.The rampant Imps added a fourth after 51 minutes when Ben House tapped home after Pym had saved his initial shot.Deji Oshilaja pulled a consolation goal back with a close range finish after a corner on 69 minutes.