I get the logo screen like it is turning on then it goes to recovery mode options. I can get to Download mode and Odin has a blue port connection but my Win8 and Win7 PCs do not see the device at all, so I cant' flash in Odin. Background - I attempted to root using jrkruse method and got stuck and never rooted. Anyone know a way around this maybe using the external SD card?
When it boots into the recovery mode options, try clearing cache and then reboot. If that doesn't work, do it again, clearing cache and also factory reset. That may allow your phone to boot back up normally.
The SDcard Unbrick method is only needed if your phone cannot boot into Download mode. In this case, it wouldn't help you because your phone is functioning in that regard.
When you have the phone in Download mode, your computer won't show it as a device in "My Computer" because it's not connected as a media device., but software that knows how to look for it can see it. If Odin is lighting up blue in the first ID:COM box, it IS seeing the phone and you will be able to flash to it.
If you're to a point where you need to flash a factory restore image, click the "AP" button in Odin to select it. The image needs to be one that ends with a file extension "tar.md5", or Odin can't see it. If what you've downloaded is a zip archive, the image is inside that and you need to extract it first. Use the image in "step 2" of
the root thread