As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL CONFIG LIGHT ILLUMINATED WHEN IT SHOULD BE EXTINGUISHED. NO CORRESPONDING EICAS MSG. REPLACED MFQ PROCESSOR. NEW PART BAD FROM STOCK, FUEL CONFIG LIGHT COMES ON. REMOVED NEW PART AND REINSTALLED PREVIOUS PN WITH ORIGINAL PROBLEM FUEL QTY AND TOTAL ON BOTH CDU'S BLANKED OUT. CONFIRMED BY MX'S 123409 AND 97409.