Did your install run without errors? Did it complete the install and now is inoperable? If the install completed, then first try pulling the battery for 45-60 seconds, then reinstalling and see if it boots. If so, allow it to fully boot and stay up for at least a minute, then do another battery pull, again for 45-60 seconds. I do 3 of these battery pulls after installing any OS. It always helps settle the new OS in and helps everything run smoothly.