As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE FO LOST MAGENTA LINE AND COMMAND BARS. VTK ON ND APPEARED. IT LASTED 20-30 SECONDS. VTK WENT AWAY AND MAGENTA LINE CAME BACK. NO OTHER DISCREPANCIES THE REST OF FLIGHT. GROUNDED - YES. CW B737-900 FIM 34-61 TASK 807 WITH NO FAULTS FOUND. OK FOR SERVICE.