What was found
MCP HEADING SELECT WINDOW DIGITS UNREADABLE. GROUNDED - YES. CONFIRMED FAULT, MCP HDG SELECT LCD WINDOW UNREADABLE. REMOVED & REPLACED DFCS MCP REF B737-800 AMM 22-11-34. PERFORMED ALTERNATE DEACTIVATION PROCEDURE REF ASA MAINTENANCE PROGRAM CHAPTER 5, SECTION 5-07-01, TABLE 3, ITEM 1. REVERSED ALTERNATE DEACTIVATION PROCEDURE. ACCOMPLISHED MCP INSTALLATION TEST REF AMM 22-11-34-740-801 (GP 32), DFCS LAND VERIFY TEST REF AMM 22-11-00 (GP 49), AND HGS SYSTEM TEST REF AMM 34-36-00, OPS CK NML. REF L/P 60233654 FOR A/C APPROACH SURVEY. AIRCRAFT RELEASED FROM MEL 22-16H, C/N 20015577. SEAMC NOTIFIED "JARRETT." REVERSAL OF CONFIGURATION CHANGES NOT REQUIRED.