…when you click an icon or bookmark on a computer, it triggers some action in the circuit-board?
A circuit is closed, so the computer is made aware that the event has occurred via electric impulses flowing thru wires, printed circuits and microchips.
The action taken is dependent on the hardware, firmware, software and operating system.
And according to those that prohibit electricity based on m’saken mana, can it be said the simple act of clicking a icon (opening an application) or clicking a bookmark (leading to a website) might in fact not be m’saken mana (and thus prohibited)?
I’m not qualified to answer that one. I’ll leave it to people who know halocha better than I do.