English is not my first language and I presume it isn't yours, also. Because I don't understand your message very clear.
In the first time did you have a running Slackware on that machine? And when you tried ro reinstall it broke? Without any hardware modifications?
And after, "the machine don't but the installer does" what? The installer freezes and the machine is still running?
Anyway, it seems to me a you have a hardware problem.
But, on the other hand, I'm a newbie (as everybody can read under my nick) and you may want to hear a second opinion.