@Marya28
Its specs
https://support.hp.com/ee-en/product/HP-15-Notebook-PC-series/6529963/document/c04102952
It has Intel Pentium N3510 with Intel HD Graphics (2 GHz, 2 MB cache, 4 cores) which is soldered to the system board therefore you can't replace it. You have to buy a whole new system board (if available). Please try the following list
● UMA graphics, Pentium N3520 processor, without Windows 8 part # 753099-001
● UMA graphics, Pentium N3520 processor, Windows 8 Standard part # 753099-501
● UMA graphics, Pentium N3520 processor, Windows 8 Professional part # 753099-601
● UMA graphics, Pentium N3510 processor, without Windows 8 part # 747138-001 ---> your current machine with FreeDOS
● UMA graphics, Pentium N3510 processor, Windows 8 Standard part # 747138-501
● UMA graphics, Pentium N3510 processor, Windows 8 Professional part # 747138-601
● UMA graphics, Celeron N2820 processor, without Windows 8 part # 753100-001
● UMA graphics, Celeron N2820 processor, Windows 8 Standard part # 753100-501
● UMA graphics, Celeron N2820 processor, Windows 8 Professional part # 753100-601
● UMA graphics, Celeron N2810 processor, without Windows 8 part # 747139-001
● UMA graphics, Celeron N2810 processor, Windows 8 Standard part # 747139-501
● UMA graphics, Celeron N2810 processor, Windows 8 Professional part # 747139-601
Regards,
BH***
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