As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN FLIGHT AT FL 410, NR 1 PFD AND MFD WENT BLANK AND THEN A RED X APPEARED ACROSS EACH SCREEN. SG2 WAS SELECTED AND INFORMATION WAS REDISPLAYED TO EACH SCREEN. AMBER SG2 APPEARED ON NR 1 PFD. REPLACED NR 1 IC615 IAW 34-25-02, OPS CHECKS GOOD.