Hi Bharat Sajjan,
To help narrow this down, could you please share the exact Sony headphone model and the Windows version installed on your PC? Also, does the headset appear under Bluetooth devices but fail to connect, or is it not detected at all?
At this point, I recommend that you review and try the steps provided in the AI generated answer on your thread. That reply typically include the most relevant checks for this scenario.
In the meantime, please disconnect the headset from any phone, tablet, or other device it may already be paired with. Then place the headset into pairing mode according to its manual. On the PC, remove any existing entry for the Sony headset from Bluetooth settings, restart both devices, and try pairing them again.
If the headset is still not detected, open Device Manager and check whether the Bluetooth adapter has a warning symbol. You can also install the latest Bluetooth driver from the PC manufacturer’s support website and check for available Windows updates.
You may refer to Microsoft’s official guide here: Troubleshoot Bluetooth not connecting in Windows
Please let me know whether other Bluetooth devices can connect to the same PC. Thank you so much for your understanding.
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