Can my cpu be changed out?

Jim, does not look like it. Here is a list of processors that are supported.

Intel Core2 Duo (3-MB L2 cache) P8400, 2.26-GHz processor 490111-001

Intel Core2 Duo (3-MB L2 cache) P8600, 2.4-GHz processor 490112-001

Intel Core2 Duo (3-MB L2 cache) P7350, 2.0-GHz processor 501520-001

Intel Core2 Duo (6-MB L2 cache)T9400, 2.53-GHz processor 490113-001

Intel Pentium (1-MB L2 cache) T3200, 2.0-GHz processor 490115-001

Intel Pentium (1-MB L2 cache) T3400, 2.16-GHz processor 501523-001

Intel Pentium (2-MB L2 cache) T5800, 2.0-GHz processor 501521-001

Intel Pentium (2-MB L2 cache) T5900, 2.2-GHz processor 501522-001

Intel Celeron-M (1-MB L2 cache) 575, 2.0-GHz processor 490116-001

Intel Celeron-M (1-MB L2 cache) 585, 2.16-GHz processor 490117-001

Intel Celeron (1-MB L2 cache) T1600, 1.66-GHz processor 501524-001

Intel Celeron (1-MB L2 cache) T1700, 1.86-GHz processor 501525-001

AMD Turion Ultra Dual-Core (2-MB L2 cache) ZM-80 2.1-GHz processor 498465-001

AMD Turion Ultra Dual-Core (2-MB L2 cache) ZM-82 2.2-GHZ processor 498466-001

AMD Turion Dual-Core (1-MB L2 cache) RM-70 20-GHz processor 498467-001

AMD Turion Dual-Core (1-MB L2 cache) RM-72 2.1-GHz processor 498468-001

AMD Athlon X2 dual-Core (1-MB L2 cache) QL_60 1.9-GHz processor 498469-001

AMD Athlon X2 dual-Core (1-MB L2 cache) QL-62 2.0-GHz processor 498470-001

AMD Sempron Single Core (512-KB L2 cache) SI-42 2.1-GHz processor 498471-001

AMD Sempron Single Core (512-KB L2 cache) SI-40 2.0-GHz processor 498472-001

from here. Hope this helps, good luck.