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Yes this heat can be normal.
When you plug it back in your PC's usb port, is it detected correctly? Can you upload designs with the Quartus programmer and does it report success?
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Yes it is detected. I see the board in the device manager. I am also able to upload basic designs on the board through Quartus, however the board doesn't execute any of them.
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DE1-SoC produce a lot of heat, this can be normal. I added an heatsink to mine. Have you tried replacing SD card, cable and computer?
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Alright that seems fair. I do have access to one of my classmates' boards and it doesn't get nearly as hot as mine. My board gets quite hot in the period of 10 seconds after power up, by quite hot I mean it is quite hot, not warm. I am not sure if that is normal.
I haven't tried replacing SD card, since I never used any.
Also tried uploading designs from a different PC and cable, same result. Designs upload to the board successfully via Quartus Programmer, fail to execute on the board itself.
Thank you for your replies!