I'm having a problem when I try to boot up. It the apple logo gets like a crossed out sign on top of it and when I start with -x it states "Still waiting for root device..." If there a solution to this.

System Specs

- Acer Aspire 5520-5912 Notebook PC
- AMD Turion 64 X2 Mobile Technology TL-58 (1.9GHz/1MB/1600MHz)
MMX(+), 3DNow! (+), SSE, SSE2, SSE3, x86-64
- 2GB DDR2 PC2-5300 Dual-Channel RAM
- 160GB SATA II HDD
- DVD-Super Multi double layer
- NVIDIA GeForce 7000M/nForce 610M (nForce 560 chipset)
- Atheros AR5007EG Wireless Network Adapter
- Realtek High Definition Audio