Based on what I could find you can replace the CPU. Pictures I found of the motherboard show the CPU is removable.
Looking at the user guide it is compatible with the following i7 Intel CPU.
Intel® Quad Core® i7-3840QM 2.80-
GHz processor (SC turbo up to 3.80-
GHz; 1600-MHz FSB, 8.0-MB L3 cache,
45 W)
●
Intel Quad Core i7-3820QM 2.70-GHz
processor (SC turbo up to 3.70-GHz;
1600-MHz FSB, 8.0-MB L3 cache,
45 W)
●
Intel Quad Core i7-3740QM 2.70-GHz
processor (SC turbo up to 3.70-GHz;
1600-MHz FSB, 6.0-MB L3 cache,
45 W)
●
Intel Quad Core i7-3720QM 2.60-GHz
processor (SC turbo up to 3.60-GHz,
1600-MHz FSB, 6.0-MB L3 cache,
45 W)
●
Intel Quad Core i7-3632QM 2.20-GHz
processor (SC turbo up to 3.20-GHz;
1600-MHz FSB, 6.0-MB L3 cache,
35 W)
●
Intel Quad Core i7-3630QM 2.40-GHz
processor (SC turbo up to 3.40-GHz;
1600-MHz FSB, 6.0-MB L3 cache,
45 W)
●
Intel Quad Core i7-3612QM 2.10-GHz
processor (SC turbo up to 3.10-GHz,
1600-MHz FSB, 6.0-MB L3 cache,
35 W)
●
Intel Quad Core i7-3610QM 2.30-GHz
processor (SC turbo up to 3.10-GHz,
1600-MHz FSB, 6.0-MB L3 cache,
45 W)
●
Intel Quad Core i7-2670QM 2.20-GHz
processor (SC turbo up to 3.10-GHz;
1333-MHz FSB, 6.0-MB L3 cache,
45 W)
Sources
HP Pavillion dv6 Entertainment PC Maintenance and Service Guide
eBay Search (
HP DV6 7300 Motherboard)