Is the P3177 code still there? If it is, that is the key, if not, look carefully at the L1-L2 (J1772) charge port for bend pins or damaged.
When you say the blue lights are flashing, how are they flashing? Are they flashing in progression or is the left one on constant and the middle one flashing, or???
When you say the blue lights are flashing, how are they flashing? Are they flashing in progression or is the left one on constant and the middle one flashing, or???