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03-16-2023 07:35 AM
PC makes loud siren tone when sleep mode starts.
siren stops when mouse/keyboard restarts windows. Very repeatable issue. Only started in recent days. Few weeks ago a wifi/bluetooth card was installed but can't see that this is relevant. The fan is working ok. Processor core temperature around 35C.
I can't see anything obvious in the event viewer, but advice on what to look for will be helpful.
03-18-2023 10:14 AM
Take a look in the BIOS Advanced tab. The alarm after power loss might be enabled.
Here is a BIOS simulator for your PC
Yours is the first I have heard of in a long time that still has a piezoelectric buzzer. You should be able to disable it.
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03-18-2023 12:09 PM - edited 03-18-2023 12:09 PM
I seem to have 'fixed' the siren, as no longer occuring - fyi, it was from the speaker not a piezo, as I pulled the speaker connector to check.
I now realise that the deskpro does not enter 'sleep' mode on the power timeout, only if I select Sleep from the power off menu option.
I'm having a look at the event viewer and all that is happening at the power timeout is:
event ID 7040 The start type of the Touch Keyboard and Handwriting Panel Service service was changed from auto start to demand start. (earliest)
event ID 263 A pointer device has no information about the monitor it is attached to.
event ID 267 Touch/Touchpad Hardware Quality Assurance verification succeeded. (last)
So I guess there is something preventing the timeout sleep from happening? The monitors are being switched off correctly.
I had a look at the bios before the original post and didnt' consider there was a solution there.
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