There seem to be quite a few people trying to burn DD images using PhoenixCard and failing, particularly with RemixOS. Makes me think something about the Pine64 wiki is tripping people up.
*Goes to check*
Yes, it's probably this, taken from the Software Release page of the wiki, RemixOS section:
"Setup Info
As for your overscan issue, as Luke says, your TV may have a setting that can correct this for you. Not all TVs do, though, and the setting you need to adjust could have any number of names.
*Goes to check*
Yes, it's probably this, taken from the Software Release page of the wiki, RemixOS section:
"Setup Info
- Use Winrar to extract the img file form the archive
- Use Allwinner PhoenixCard Bootable SD-Card Creator to create the bootable SD Card."
As for your overscan issue, as Luke says, your TV may have a setting that can correct this for you. Not all TVs do, though, and the setting you need to adjust could have any number of names.