Mainboard for X3400 M3 / X3500 M3 — Compatible with 81Y6003, 81Y6004, 69Y0961, 69Y3752

Replacement mainboard compatible with X3400 M3 and X3500 M3 server models. This board corresponds to part numbers 81Y6003, 81Y6004, 69Y0961 and 69Y3752. Use as a direct swap to restore functionality in affected X3400 M3/X3500 M3 units — verify the listed part numbers against your existing board before ordering.