ER-301/Replacing the CPU Board
From O|D Wiki
Sometimes it is necessary to replace the CPU board on the ER-301. This process is easy and safe as long as you take your time, take basic anti-static precautions and do not force anything.
- Purchase a replacement CPU board (AM3352-SOM) from Olimex for about 37EUR: https://www.olimex.com/Products/SOM/AM3352/AM3352-SOM/
- Remove the rear uSD from the old CPU board and insert it in the SD slot on the new CPU board.
- Carefully pull off the old CPU board by prying up each side little-by-little. Do NOT try to forcefully pull it off all at once.
- Carefully align the pins and push on the new CPU board.
Also, here is a very informal video showing how: