-601 = Windows board, -001 = non-Windows (MSG copy "xxxxxx-601: Windows operating system"; MSG lists N0127x-xx1 patterns only). CPU soldered; RAM is socketed SODIMM. Match the exact board PN/CPU. PartSurfer OrderFlag 0 on 7N504US/759J3US/7K7U8US. Resellers list it for ProBook 440 G9 / 450 G9 (DAX8SFMB8B1). Configuration-specific: 3/8 checked SKUs. Match your product number or the original part number. OEM parts list only; not bench-tested.
Source notes
Saved HP PartSurfer product BOM(s) on box (partsurfer/cache_<SKU>.json, captured before this loop; no new HP fetch, HP OEM cool-down ON). Listed for 3 of 8 checked US product numbers (7N504US, 759J3US, 7K7U8US; product name "HP ProBook 450 15.6 inch G9 Notebook PC (674N1AV)"). HP description: "SPS-MB UMA i7-1255U WIN". Keyword: Unknown Keyword. OrderFlag: 0. (via MM-LOOP-051).