As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CHECK GW AND FUEL INDICATED IN SCRATCH PAD OF FMC. BOTH FMC PERF PAGES SHOWED BLANK FUEL INPUT RAN QRH "FMC/CDU ALERTING MESSAGE" MANUALLY ENTERED & UPDATED FUEL. ALL OTHER FUNCTION OPERATE NORMAL. ACFT GROUNDED. REPLACED FUEL QUANTITY PROCESSOR UNIT IAW MM 28-41-81-000-801 / MM 28-41-81-400-801. PERFORMED FQIS OPS TEST IAW MM 28-41-00-710-801. ALL TESTS PASS.