#2642
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    Keymaster

    Check the back of the motherboard for the “mini” switches. These are latching relays used to troubleshoot components in the system, often appearing as small white buttons in groups of three. If one of these relays has been accidentally pushed, it could latch a subsystem on or off.

    I once accidentally latched out the CC over-the-road air this way.

    It might be worth a look.

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