What was found
WHEN THE POWER LEVERS ARE ADVANCED TO THE TAKEOFF POSITION AND THE AIRCRAFT BEGINS TO ACCELERATE THE NO TAKEOFF MESSAGE AND CHIMES COME ON. THE TAKEOFF WAS ABORTED. [07-13-07] THE NO TAKE OFF BOX ON THE NR 2 MFD WAS CHECKED BUT DISPLAYED NO MESSAGES . TAKE OFF WAS ATTEMPTED AGAIN. SAME PROBLEM. TRIMS WERE THEN CYCLED, ENGINE SYNC CYCLED, IAC'S WERE RESET ON IMT PAGE, AND CONFIGURATION RESET FOR TAKEOFF. ANOTHER TAKEOFF ATTEMPT. SAME PROBLEM. R & R BOTH LT & RT FUEL FLOAT SENSORS. ALL WORK WAS PERFOMRED I.A.W. 28-20-07. NO FURTHER DISCREPANCIES NOTED.