Sounds like it is trying to boot from the second drive. What is the boot order set in the BIOS ?
Have you tried to boot to the BIOS with just the new drive installed ? One possibilitiy: Any Jumpers on the drive ? If both drives are set to "master" they could fight each other.
Suspect there are inexpensive USB to SSD adapters available. I'd see if the drive can mount as an external drive but feeling is that the new drive is either conflicting or bad.