Can't install FreeBSD Current or 7.0 on AMD Turion 64x2 Mobile TL-58 1.9 Ghz in an Acer 5520-5679

We have an almost new Acer 5520-5679 in the office that we intended to  
partition and  install 8.0-CURRENT-200712-amd64 but much to my  
surprise accessing the cdrom it went into an immediate, unreadable  
loop of hex numbers that can only be stoped by powering down.  I next  
tried 7.0BETA-4 standard (no amd64) and I can get to the Welcome menu  
but with all options end up with a BTX halted, almost immediately.

The machine specs are:
AMD Turion 64x2 Mobile TL-58 1.9 Ghz 2x512K Lw cache
2GB DDR2
160G HDD

Short update.  I built a release locally with yesterdays sources  
7.0-BETA4 with the same problem.

Has anyone else seen this with Turion 64x2 or is it an Acer thing.  We  
should learn that cheap is often expensive.

Thanks,

ed

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