I recently returned my Surface 2 and power supply to the retatiler I purchased it from due to a charging fault. The retailer sent both items to Microsoft for repair/replacement. After a week or so I was supplied with a replacement tablet but the original power supply. The retailer tested the tablet and power supply before I left the store and unfortunately the problem still existed. I am therefore quite sure the power supply is at fault. The retailer wouldn't supply a replacement charger from store stock and told me all they could do was once again send the tablet and power supply back top Microsoft for repair/replacement. I decided to take the tablet and power supply home and arrange to send it back to Microsoft myself. Can anyone tell me if it would be necessary for me to send the replacement tablet back to Microsoft or would it be acceptable to just send the power supply as it seems quite obvious that it, not the tablet is causing the charging issues?