Hello,
I have installed Win7 and Ubuntu 12.04.2 on a Precision 4500 and at boot I get the grub rescue prompt.

First I tried booting from the live CD and mounting/chrooting to the installed partition and running update-grub and grub-install /dev/sda. The completed without error.

Second I booted from the live cd and installed boot-repair. It said that it completed without error. http://paste.ubuntu.com/5894328/

These two methods did not fix the problem and offered little insight.

The last hing I have tried is working from the grub rescue prompt.
I can type ls and get the partition list.
If I enter ls (hd0,msdos5)/ I do see the root of the ubuntu filesystem (/etc, /usr, /boot etc, ...)

But, when I enter ls (hd0,msdos5)/boot or ls (hd0,msdos5)/etc I see no files so I cannot proceed with inserting the normal module. I have verified that the files are there from the live cd and /boot is not on a separate partition.

Any ideas? questions?

added details:
Win 7 64 bit fresh install wit default options
Ubuntu 12.04.2 64 bit fresh install with default options
SSD drive

Don't see anything obvious, Grub on the mbr and the menuentries look OK. The below commend looks interesting:

Thx,
According to the Bios it is set in Legacy mode as opposed to UEFI.
TPM security is disabled as well.

I just tried chrooting in and running updates and installing ia32-libs but no behaviour changes.

This appears to be a failing motherboard or disk controller. We are now getting random inability to boot and flashing leds on the keyboard.

Thanks for looking.