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Since ECS (EliteGroup) manufactured many of these boards for Acer, the ECS Elitegroup H81H3-M3 Manual

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A: This motherboard was primarily used in the Acer Veriton M2631G , Aspire TC-603 , and some Veriton E430 and Aspire XC-603 models.

What specific or upgrade are you working on right now?

The official Acer manual will say "Refer to qualified service personnel." Here is the real truth.

Usually found near the CMOS battery. Move the jumper from pins 1-2 to 2-3 for 10 seconds, then return to 1-2.

The board offers standard connectivity for office and light home use: 1x VGA, 1x DVI-D, 1x HDMI (depending on specific revision) 2x USB 3.0 (Blue), 4x USB 2.0 1x RJ-45 (Gigabit Ethernet) 3x Jacks (Line-in, Line-out, Mic-in) ⚠️ Important Maintenance Notes BIOS Updates: