Have an older Dell Dimension E520 that is experiencing a wierd issue. This is my parents computer, though I now have it in my possession for troubleshooting, so I don't know what brought it on, but from what I'm told, one day they all of a sudden were unable to boot into Windows.
Now on startup the BIOS screen and first screen or two (where it is detecting drives, etc.) are full of very garbled text. (I will post pics at addresses below). I can see the BIOS text "underneath" but as shown, these weird characters persist.
It will take you to the windows boot menu where I can select to start in safe mode, or continue regular boot. Regular boot will hang. Safe mode usually succeeds, albeit with low resolution, fewer colors, etc.