You may want to look through the files in /var/log. That is where most distros put their log files. I run Gentoo but I think that is where Redhat puts theirs too.
You may have more than one file in there though. If it is a kernel thing, you may want to check the kernel log.
You may also want to type dmesg and see if it gives you what you want. That shows a lot of boot info. If it is to long try dmesg | less . That will print one page to the screen at a time. Hit space bar to go to next page and "q" to quit.
Hope that helps a bit anyway.