As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON INITIAL POWER UP BOTH FMC'S WOULD BLANK OUT AND VTK MESSAGE APPEARS , LOOSE LATER RESETS & DOES THE CYCLE AGAIN. GROUNDED - YES. ACCOMPLISH B737-900 FIM 34-61 TASK 801 FMC BITE CHECK & FIM 34-61 TASK 835 FMC DISAGREE - BOTH OPS CHECK OK.