My Proxima +922 needs a power supply. Where can I get one? Or must I build one?

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you can build a power cable

If you know the pin-out and the required voltage and current levels for each pin, then you could buy a DIN connector and wire up some wallwart type power cubes to it.

Places like digikey.com or mouser.com have any DIN connector you could need, and they will both be happy to sell you one piece. They also have tons of different little wallwart power supplies.

Beware of powering just one part of a panel that requires multiple voltages. If I did this with two or more wallwarts, I would plug them all into a power strip with a single switch. LCDs can be damaged if they get power without a drive signal that changes polarity quickly. You can't make that happen by not having a VGA cable attached, but it might happen with +- 18 volts on and +5 volts off.
 
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