I have a 40w desk fan.
It has an analogue turn switch to turn on and change speed settings. Photo:
I currently have two displays. An old Dell 1703FTP and a Samsung P2450h from 2010~.
The Samsung flickers when I change speed in either direction and when turning on. The screen shows 'HDMI' after it recovers from the flicker on/off.
It ALSO causes my speakers to make a kinda pop sound.
There are 2 types of flicker that happen. One is juddering of the image on screen.
The second is the display is lost with a flicker, then a second or so later comes back again with the screen saying 'HDMI', like as if it only just detected the input.
I can also dictate which type will happen for the most part. If I turn the switch on the fan slowly then the second type of flicker occurs (loss of display for a second or so).
The Dell display is unaffected by this.
> Why is the Dell not affected?
> Why is this happening to the Samsung screen?
I tested it with 2 other fans. One has a digital control (a digital on/off switch with a bunch of other buttons for various modes and functions), and the other has the same type of analogue switch present on my fan.
- The digital fan causes no flickering at all AND no speaker pop sound.
- The other analogue fan causes the EXACT same issues only even more juddering and the speaker pop sound.
Speakers are Logitech Z5500.
Digital fan
Other analogue fan
EDIT: Tested on another socket in my room (same room) and the same issue occurs.
It has an analogue turn switch to turn on and change speed settings. Photo:
I currently have two displays. An old Dell 1703FTP and a Samsung P2450h from 2010~.
The Samsung flickers when I change speed in either direction and when turning on. The screen shows 'HDMI' after it recovers from the flicker on/off.
It ALSO causes my speakers to make a kinda pop sound.
There are 2 types of flicker that happen. One is juddering of the image on screen.
The second is the display is lost with a flicker, then a second or so later comes back again with the screen saying 'HDMI', like as if it only just detected the input.
I can also dictate which type will happen for the most part. If I turn the switch on the fan slowly then the second type of flicker occurs (loss of display for a second or so).
The Dell display is unaffected by this.
> Why is the Dell not affected?
> Why is this happening to the Samsung screen?
I tested it with 2 other fans. One has a digital control (a digital on/off switch with a bunch of other buttons for various modes and functions), and the other has the same type of analogue switch present on my fan.
- The digital fan causes no flickering at all AND no speaker pop sound.
- The other analogue fan causes the EXACT same issues only even more juddering and the speaker pop sound.
Speakers are Logitech Z5500.
Digital fan
Other analogue fan
EDIT: Tested on another socket in my room (same room) and the same issue occurs.