Acer Aspire 7740G 7740 Laptop system board. Gateway / Acer Part number: MB.PLY01.001, MBPLY01001. Motherboard Part Number: 55.4GC01.051G, 554GC01051G, 48.4GC01.011, 484GC01011. Check Compatibility. Match Motherboard "MB" P/N. Refurbished. Fully tested. 100% Working. 30 Day warranty. IMPORTANT TECH NOTE: there may be several different (and non-interchangeable) motherboards available for this notebook series, so prior to placing your order, locate your motherboard part number and then order that exact number. P/N is usually located on the memory slot. Acer Aspire Laptops: 7740, 7740G, and others.