cant hear from speakers

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 32 bit
Processor: Intel(R) Celeron(R) CPU E1200 @ 1.60GHz, x64 Family 6 Model 15 Stepping 13
Processor Count: 2
RAM: 2815 Mb
Graphics Card: NVIDIA GeForce 7050 / NVIDIA nForce 610i, 256 Mb
Hard Drives: C: Total - 152524 MB, Free - 80551 MB;
Motherboard: Packard Bell BV, MCP73VT-PM
Antivirus: AVG Anti-Virus Free Edition 2011, Updated and Enabled


Ever since I unplugged my speakers to move my computer they don't work can anybody help!.