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  • Patch Lady – who knew a cmos?

    Posted on October 23rd, 2020 at 12:30 Susan Bradley Comment on the AskWoody Lounge

    So the other day someone plugged in a usb dongle to an HP Z240 workstation.  And it turned off.  And wouldn’t turn back on again.

    So I purchased a replacement power supply thinking it was that.  But it turned out once I connected the new power supply in, still no go.

    In searching around, I found a post talking about clearing the CMOS by removing the CMOS battery and pressing the CMOS reset button on the motherboard.

    Sure enough, that did the trick.  The computer now boots up as normal.  That said I’ll be plugging things into the usb slots in the front just to make sure there isn’t something else wrong with the machine.   I’ve had two other machines recently that had their power supply died on me.  The HP Z240 was the easiest to change out the power supply.  The hardest was a small form factor home built unit that I needed smaller fingers in order to plug in all the plugs.