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How To Build A PC Into Your Car: Page 23 of 27

Install memory and configure VIA mainboard ___
2 Install the motherboard on the base plate of enclosure using four screws.

See illustration of parts layout above.

___
3 Install the 2.5-inch hard drive using the four silicone rubber shock absorbent pads over the hard drive mounting holes. Fasten the hard drive using four undercut M3 screws attached from the bottom. (See illustration of parts layout, above). Shock pads for mounting the hard drive are included with the VoomPC enclosure ___
4 Attach a 44-40 pin IDE cable to the hard drive and motherboard. ___
5 Attach the M2 ATX power supply over the hard drive, using the remaining standoffs. See illustration of parts layout above. ___
6 Connect the ATX cable harness (provided with power supply) to the motherboard. Use small tie-wraps to manage the ATX cable harness. This is important, not only to prevent rattle and cable wear, but to improve air-flow critical for proper cooling. Note: If you are using a different VIA mainboard, you may be able to eliminate the ATX cable harness entirely, by a custom ATX power extender bus made for use with some EPIA MII mainboards (available from http://www.mini-box.com ) ___
7 Connect the Red / Black / White (terminated in faston quick-splice connectors) to the power supply. Red is un-switched battery, white is switched battery (ignition) and Black is GND. When looking for a power connection in, remember that the switched battery (ignition) is usually present on your cigarette lighter or most of your 12-volt power wires. Un-switched battery (harder to find) is present on your alarm system or other 'always-on'
electronics. Use a volt-meter to detect switched versus un-switched wires. If hard to find, connect directly to the battery.
___
8 Connect the LED wire to the LED output if you're the M2-ATX for LED pins. ___
9 Connect the ON/OFF wire harness (provided in the PSU package) to the M2-ATX ON/OFF controller and to the ON/OFF mainboard switch. ___
10  (Optional) Attach your audio amp See details in VoomPC enclosure manual to connect the Amp Enable wire harness to your amp. Please pay special attention to the polarity of the wires. Note: Your amplifier remote control unit actually needs only one wire (RMT), GND is optional. ___
11 Hook up display, keyboard, etc, and perform a quick test of your system by turning ignition ON ___
12 Attach temporary CD-ROM drive to load operating system and application software. ___
13 Secure the enclosure in the vehicle using the four front/back mounting screws. If you don't want to drill holes into your car chassis, large velcro pads work well when attached to the bottom plate of the enclosure. Use the "hook" side of the velcro pad on the PC to attach to your car's carpet. This works very well in most interiors. ___
14 Locate and mount touch screen. For many applications, this can represent a bulk of the work and require patience. Work slowly and carefully knowing that a slip of the Exacto knife or spilling adhesive will mean a trip to scrap yard or a costly trip to the dealer's parts department to fix. ___

Here's a photograph showing how the components are placed for assembly onto the bottom plate of a VoomPC case. Note the overlapping strata of parts to retain our small footprint: