I not technical rither, but generally there is a problem with Nvidia graphic cards and so it cannot load graphic driver. Nvidia is proprietary and so the driver is not installed by default.
In linux, drivers are not needed to be installed like we do not win 7. Open source drivers are included in the Linux Kernel.
Another reason for not starting Linux is multiple RAM sticks. Many users remove additional sticks and after installation, they fix it back, which is not so convenient in case of Laptops / netbooks
I have seen many users have this problem with LM 12, LM 11.
I hope you are talking about Linux Mint 12 main edition 32 bit. Always try 32 bit edition.
As suggested, try USB media. Not all USB pen drives work properly as LIVE USB
. You can make LIVE USB from ISO file using unetbootin.
Always check Md5 tag.
since you have tried other Linux Distros, so corrupt ISO issue should be eliminated.
So 2 reasons are Multiple RAM sticks and possible error due to Nvidia driver issue.
There is slim chance that due to motherboard, Linux is not able to boot.
In case of hardware failure like faulty motherboard, even Windows will not boot. In case of faulty RAM, you will soon greeted by Blue Screen of Death. In both cases, you wont be able to run any Linux Distros.