My first thought was that there’s no way a motherboard should supply enough power to the USB port for something that dramatic. Maybe theoretically possible with a dedicated USB charger or some sort of USB-C Power Delivery port, but pretty much every standard Type-A Port on a PC will be limited to 5V and either 1 or 2.4 amps. Nowhere near enough for this. Even if something went wrong it would be a barely visible puff of smoke.
I do see that this is an optical mouse. So maaaaybe something with the lense and laser happened that could cause a bit of a scorch mark to the mousepad? But in the pictures you can see the area around the lense is completely untouched and most of the damage is actually on the top of the mouse.
My first thought was that there’s no way a motherboard should supply enough power to the USB port for something that dramatic. Maybe theoretically possible with a dedicated USB charger or some sort of USB-C Power Delivery port, but pretty much every standard Type-A Port on a PC will be limited to 5V and either 1 or 2.4 amps. Nowhere near enough for this. Even if something went wrong it would be a barely visible puff of smoke.
I do see that this is an optical mouse. So maaaaybe something with the lense and laser happened that could cause a bit of a scorch mark to the mousepad? But in the pictures you can see the area around the lense is completely untouched and most of the damage is actually on the top of the mouse.