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Often a temporary issue can be fixed by a special reboot sequence. First, disconnect any attached devices other than a monitor (so you can see what the computer is doing). Disconnect the power cable from the back and hold down the power button for 30 seconds. Then release the power button, reconnect the power cable and press the power button for about a second. This makes sure that all internal systems start from scratch, especially the memory.
Good luck!
Last edited by Dick Strauss; 11-19-2021 at 9:53 PM.
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