FOR NM-D521 Laptop Motherboard — Compatible Replacement for 3-14ALC6 / 3-15ALC6 | 5B21B85215, 5B21B85225 — CPU R35300U UMA D4G

Replacement laptop motherboard NM-D521 compatible with 3-14ALC6 and 3-15ALC6 models. Matches part numbers 5B21B85215 and 5B21B85225 and supports the R35300U CPU with UMA D4G graphics. Designed as a direct compatible swap for systems using these specified mainboard variants.