Hi,
As you mentioned that both of your external headset and speaker doesn’t work, only internal speaker works. It is probably caused by audio driver so
I suggest you take the following steps to find out and solve the issue,
• 1, connect your external autistic device to another PC/Laptop to verify its works well
• 2,select Start → Settings → Update & Security → Troubleshoot → Additional Troubleshooters → Playing audio → Run the troubleshooter
• 3, Disable local speaker, right click the loudspeaker icon at right side of task bar (system tray), then select Sound, click playback and recording to see whether your laptop can recognize your external devices, disable local device by right click and disable accordingly and test your plugged in devices.
• 4. Update audio driver, press WIN+X and then open the Device Manager select inputs and outputs update drivers by right clicking and choosing update driver accordingly.
Hope above information can help you.
============================================
If the Answer is helpful, please click "Accept Answer" and upvote it.