[ubuntu] Optiplex GX520 ubuntu 12.04.1 installation failed

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http://ubuntuforums.org – I'm trying to install ubuntu 12.04.1 on my Optiplex GX520. I get an Installation Failed message. It suggests it could be a faulty CD-rom or something. Is there a log file or something that provides more information on why the installation failed. I tried using 2 different CDs that were burned on 2 different computers. I don't think the problem is the CD or the ISO. I did an md5sum check and the hash matches, so I don't think the ISO is bad. Thanks. (Hardware)