Acer Mg43m Motherboard Manual -

Look for a two or three-pin header labeled or "CLR1" . It is usually located near the bottom right corner, next to the front audio header. There is no button. You have to move a jumper cap from pins 1-2 to 2-3 for ten seconds.

This means Acer never intended for you to upgrade it. They intended for you to call their tech support if it broke. Acer Mg43m Motherboard Manual

You search for the manual, hoping for a detailed schematic of fan headers, overclocking menus, or RGB control. Look for a two or three-pin header labeled or "CLR1"

You have the proprietary PSU that fits it (Acer often uses non-standard 12-pin power). Replace it if: You want to use a standard case, standard fans, or overclocking. Acer Mg43m Motherboard Manual