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10-26-2026 02:44 PM - edited 10-26-2026 02:44 PM
Welcome to our HP Community forum!
Now, your HP Laptop PC 17t-by400 CTO has several motherboard configurations, so we need to identify the correct system board for your particular laptop before you purchase a replacement.
According to HP PartSurfer, the following system boards are listed for this model:
HP part number Configuration
| M12539-601 | Intel Core i3, integrated graphics (UMA) |
| M12540-601 | Intel Core i5, integrated graphics (UMA) |
| M12541-601 | Intel Core i7, integrated graphics (UMA) |
| M12542-601 | Intel Core i5, Nvidia GeForce MX350 2GB discrete graphics |
These motherboards should not be treated as interchangeable. The processor is part of the system-board assembly, and the M12542-601 also has a dedicated Nvidia GPU. You should match the replacement to your original hardware configuration rather than selecting a board based solely on the laptop's model name.
Could you please provide the following information?
Your original processor: Was it an Intel Core i3, i5 or i7? The full processor model would be even better.
Your original graphics configuration: Did your laptop have only Intel integrated graphics, or did it also have an Nvidia GeForce MX350?
Your HP product number: This is available on the label on the bottom of the laptop, the original packaging, or sometimes in HP Support Assistant. The product number helps identify your specific factory configuration.
You can use the product number to look up the original parts in HP PartSurfer. Please do not post your serial number publicly.
Once the original configuration is identified, you can search for the corresponding HP spare part number -say via eBay or AliExpress, and check availability from reputable replacement-parts suppliers.
Kind Regards,
NonSequitur777