Hello @PortuGal unfortunately the MSN number is not the one we are looking for 20054842= PC case, including power supply. look for a number that reads 100xxxxx, the sticker may be attached under the device. did you get the graphics card out? If you think it's the battery, replace it. It only costs a few cents, and there's no harm in replacing it, especially since the computer was inactive for a year. When I move house, I unplug all cables from the device. So I'm asking if the monitor is plugged into the correct slot (on the graphics card) and not the slot on the motherboard. then it would output these beeps because the connection on the motherboard is inactive bye Fishtown
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