Pairing Cannot Be Done; Cannot Make A Bluetooth Connection - Sony STR-DH770 Manual

The audio file is a multiple track audio file.
Some AAC files may not be played correctly.
WMA files in Windows Media Audio Lossless and Professional formats cannot be played.
USB devices formatted with file systems other than FAT16, FAT32 or NTFS are
unsupported (*).
Playback is possible up to 8 levels(including the root folder).
Folder paths to the file are longer than 128 characters.
There are more than 150 files.
If you use a partitioned USB device, only audio files on the first partition can be played.
Files that are encrypted, protected by passwords, etc., cannot be played.
* The receiver supports FAT16, FAT32 or NTFS, but some USB devices may not support these FAT systems.
For details, refer to the operating instructions of each USB device or contact the manufacturer.
[171] Troubleshooting BLUETOOTH device

Pairing cannot be done.

Move the BLUETOOTH device closer to the receiver.
Pairing may not be possible if there are other BLUETOOTH devices near the receiver. In
this case, turn off the other BLUETOOTH devices.
Correctly enter the same passkey that was entered on the BLUETOOTH device.
[172] Troubleshooting BLUETOOTH device

Cannot make a BLUETOOTH connection.

The BLUETOOTH device you attempted to connect does not support the A2DP profile, and
cannot be connected with the receiver.
Press BLUETOOTH on the receiver to connect to the last connected BLUETOOTH device.
Turn on the BLUETOOTH function of the BLUETOOTH device.
Establish a connection from the BLUETOOTH device.
The pairing registration information has been erased. Perform the pairing operation again.
While connected to a BLUETOOTH device, this receiver cannot be detected.
Erase the pairing registration information of the BLUETOOTH device and perform the
pairing operation again.
[173] Troubleshooting BLUETOOTH device
The sound skips or fluctuates, or the connection is
lost.
The receiver and the BLUETOOTH device are too far apart.
If there are obstructions between the receiver and your BLUETOOTH device, remove these
or move the receiver and/or device avoid them.
If there is a device that generates electromagnetic radiation, such as a wireless LAN, other
BLUETOOTH device, or a microwave oven nearby, move it away.
[174] Troubleshooting BLUETOOTH device
The sound of your BLUETOOTH device cannot be