I removed the HDD from a Toshiba Computer I bought today and installed a 250GB SSD. After installing it, I immediately installed Ubuntu 14.04 on it from a USB drive. Everything went fine during installation, but when I restarted I got the message "Reboot and select proper Boot device or Insert Boot Media in selected Boot Device and press a key". That message came up after a nano second screen that says "Checking Media Presence" and then "No Media Present".
When I reboot using the USB stick, I can see the SSD drive and it has the OS written on it and it looks like it's been partitioned correctly.
Can someone please tell me what I need to do to get my computer to boot up? I read something about how the Secure boot and CSM or UEFI might be a factor, but I'm not experienced enough with new Bios to know how to configure those settings. I also read about Grub probably not installing on the SSD and I might just have to fix Grub for it to work, but I haven't been able to do that through the Ubuntu running of the USB stick. Any help or links to good threads would be very helpful. If you have any questions, I would be very happy to help you in helping me.