Re: Installing RAM
You're computer isn't recognizing an Operating System on the hard drive, or isn't detecting a hard drive at all.
If all connectors are fine, then the Hard Drive or connectors are broken.
Test the Hard Drive in another computer to check.
Or run a Hard Drive test in your BIOS if it has one.
Laptop: Dell XPS 17 | i5-2450M @ 2.5GHz | 6144MB RAM | GeForce GT 550M
Desktop: HAF 932 Advanced | i5-3750k @ 4.4GHz | CORSAIR H100 | ASUS P8Z77-V | EVGA GTX 680 2GB | 8GB G.SKILL DDR3 @ 1600 | MUSHKIN 240GB SSD | WD 500GB 7200RPM HDD