Thank you for taking your time to look at this issue.  I have a Yaesu VX-170 that I came across.   Once I got it home I did a reset on the radio to bring it back to factory defaults.   Next I tried reading the radio from Chirp, (Download from Radio).   That fails no matter what I try it will not download the file from the radio.  

The radio almost immediately shows error after pressing push to talk seeing TX.  and then in chirp I see Failed to communicate with radio: Failed to read header (0)

Attached is the Debug.  

Also just for testing I got a VX-170 file from a friend and tried to download it to the radio also had errors.   As soon as I get the radio into RX Chip shows a error indicating Radio did not ack block at 0 the radio screen never shows error it continues to show RX.

See attached Debug.log file.

Note I tested the cable to see if it was the problem borrowed a friends cable as well, both cables same issue, and both cables successfully program an FT-60 and my friend is able to read/write his VX-170 with his cable and my cable and he sees the same errors as I do when trying my radio.

I tested the jack with a speaker mic to make sure the jack seems to be working correctly, speaker mic work fine can RX and TX.

Finally in desperation I removed the battery and opened the little cover under the battery and confirmed the radio was modded by someone removing the 1 0 ohm resistor, and it looks like it only had 1 resistor as the 2nd upper one looks to clean as if it was never there from the factors.   I believe the MOD is Expanded RX or TX I do not recall as I've never needed to perform the mod was aware of it from researching the radio itself.

Thanks for any assistance.  Attaced is the debug file that should contain both Download and Upload from Radio failures.