I found that a conventional laptop computer is fragile for use in the field and decided to create my own ruggedized PC that would be suitable for use in the field and the workshop. Having upgraded my desktop, I have a spare socket AM3 motherboard. The motherboard has an integral video adapter, so will not require a bulky graphics card. To power the PC, I will use a 12 volt ATX power supply. A 19" Samsung LED LCD will be used. The screen comes with a 14.2V mains power supply, this is more than the intended 12v input. I attempted to power the screen with 12V but it would not switch on. To ensure the the LCD will have a consistent 14.2V input, I will use a buck-boost regulator. This means the PC will be able to take a wide input range from 10-20V.
The case is constructed from sheet aluminum and 1" aluminum equal angle and held together using M4 stainless-steel cap headed bolts. I think it should be up to the job when it's finished.