Kisianik
I purchased 530 MT in 2007
I've thought about it, in fact I have an Antec Mid Tower case 'on the shelve', but as the G33M02 motherboard doesn't support Core 2 Quad processors, it not worth the effort, plus I would not try to install a Dell motherboard a retail ATX case, it's to much agro, easier to buy a standard retail ATX motherboard.
It has a fairly decent Core 2 Duo e8400, runs 64-bit W7, SSD cache drive and two1tb hard drives, all upgrades by me.
Dell not only had to replace the video cards and hard drive under warranty, they also replaced the motherboard and optical drives, it's one time that having a warranty paid off for me.
Regards pressing F1 on start, a Dell motherboard has BIOS that are tweaked by Dell, could that be the cause?
Ain't computers fun. LOL
Bev.