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Windows 7: Why does turning on/off a desk light wake up my PC?

1 Week Ago   #1
martinlest

Windows 7 Home Premium SP1 64-bit
 
 
Why does turning on/off a desk light wake up my PC?

I can't see a Windows option for this! When I turn off my lamp, my PC wakes up from standby. I'd rather it didn't - any 'fix'? (The PC powers from the mains via a UPS).

Thanks!


My System SpecsSystem Spec
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1 Week Ago   #2
Paul Black

7 HP SP1 64-bit Vista HB SP2 32-bit Linux Mint 18.3
 
 

Hi martinlest,

Quote   Quote: Originally Posted by martinlest View Post
I can't see a Windows option for this! When I turn off my lamp, my PC wakes up from standby. I'd rather it didn't - any 'fix'? (The PC powers from the mains via a UPS).
Maybe it is something to do with the interference/change in the power!
My System SpecsSystem Spec
1 Week Ago   #3
Megahertz07

Windows 7 HP 64
 
 

That I never hear about.

- What kind of lamp you turn off (filament, electronic gas tube or electronic led)? Electronic has a rectifier that generates harmonics.
- Does the UPS has a USB cable connected to the computer to shut it down in case of a power failure? Are the UPS battery's still holding energy?
My System SpecsSystem Spec
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1 Week Ago   #4
Ranger4

Windows 7 Home Premium 64 bit sp1
 
 

It may be caused by vibrations caused when actually turning off the light, being transferred to the mouse & waking the computer. Try turning the light off more gently or use a mouse pad to reduce vibrations being transferred to it.
My System SpecsSystem Spec
1 Week Ago   #5
Paul Black

7 HP SP1 64-bit Vista HB SP2 32-bit Linux Mint 18.3
 
 

Quote   Quote: Originally Posted by Ranger4 View Post
It may be caused by vibrations caused when actually turning off the light, being transferred to the mouse & waking the computer. Try turning the light off more gently or use a mouse pad to reduce vibrations being transferred to it.
Good point .
My System SpecsSystem Spec
1 Week Ago   #6
martinlest

Windows 7 Home Premium SP1 64-bit
 
 

Quote:
It may be caused by vibrations caused when actually turning off the light
Nice idea, but no, I turn it on and off at the plug, way away from the PC, where there is a little switch. It's just a desk lamp, with a common or garden light bulb (i.e. filament)... nothing special.

Quote:
Does the UPS has a USB cable connected to the computer
Yes (a likely culprit?)

Quote:
Are the UPS battery's still holding energy?
Yes.

Thanks
My System SpecsSystem Spec
1 Week Ago   #7
Megahertz07

Windows 7 HP 64
 
 

When you turn of a device, it generates a spark on the switch that generates radio frequences.
- Cover your mouse with a aluminium paper (to block RF)
- Try to detach the UPS USB cable.
My System SpecsSystem Spec
1 Week Ago   #8
Banyarola

Windows 7 64 bit
 
 

I had a similar problem once..It was a bad battery in my UPS
My System SpecsSystem Spec
1 Week Ago   #9
martinlest

Windows 7 Home Premium SP1 64-bit
 
 

The battery shows as good on the display... well, it's no big deal. I just make sure I turn the light on or off before I put the PC into standby...
My System SpecsSystem Spec
1 Week Ago   #10
Banyarola

Windows 7 64 bit
 
 

If you can, lower the sensitivity on the UPS..If you have an APC brand you can do it on them..I have mine set on low..

Try also plugging the lamp into a surge outlet and not a backup outlet..
My System SpecsSystem Spec
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 Why does turning on/off a desk light wake up my PC?




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