Generally, your type issue is caused by a tripped or defective GFCI receptacle, but a GFCI also will not trip or test if CIRCUIT BREAKER tripped and no power to it.
Generally, there are TWO GFCI receptacles= one bath and one kitchen. Kitchen often overlooked, but over sink on bottom of cabinet, so BEND over and LOOK UP. GOOD LUCK
2000 Conquest LE 6266, Class-C on 99-E450SD, 6.8, 2v, V-10