Remember, Mint 7 is a Release Candidate, it is not finished. It is not meant for your primary machine. Also here are the System requirements:
A minimum of 512MB of RAM is recommended. Once installed the system works fine with as low as 256MB RAM. The installation process deals with 2.5GB of data compressed on a 700MB CD and it can hang or fail on systems with less than 512MB RAM. If you have between 256MB and 512MB RAM you may have to try to install several times.
I just did a quick look at the specs for your laptop. You should be able to install if you have at least 512megs of ram. If you have less than this, try to boot several times in a row. If this still does not work, you might be happier with the Mint 6 XFCE or Fluxbox editions, which work with less ram:
# x86 processor
# 128 MB of system memory (RAM)
# 2 GB of disk space for installation
# VGA graphics card capable of 800×600 resolution
I installed the XFCE edition on a neighbors' old machine with only 256megs of RAM, and it works quite handily!
Malachi 3:10 NRSV
...says the LORD of hosts... I will not open...windows...for you...
Linux user since 2001 pda; 2006 lappy