What was found
DFW - FLT 1900 - EN ROUTE SLC-DFW - AFTER TAKEOFF AND PLACING HYDRAULIC PUMPS TO LOW SETTING THE RED NOSE GEAR ANNUNCIATOR LIGHT ILLUMINATED. AIRCRAFT SLOWED AND PLACED HYDRAULIC PUMPS TO HIGH AND CYCLED GEAR. AFTER HYDRAULC PUMPS WERE REPLACED TO LOW AGAIN ALL GEAR INDICATOR LIGHTS REMAINED EXTINGUISHED. LANDED DFW WITHOUT INCIDENT. REPLACE NOSE GEAR UP SENSOR AND CYCLED LANDING GEAR. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)