For what it's worth these are the versions that I have on my M7264-YB, which is also non-functional: E53 21-15579 Data Chip (ceramic) E58 2007-C Control Chip (ceramic) E63 23-003B6 ROM Chip 1 (ceramic hybrid dual chip package) E70 23-004B5 ROM Chip 2 (plastic) E75 23-005B5 KEV11 (ceramic)