Multiple Issues: Audio Problem, Unlock Mode Message, Missing Serial Number, and WLAN Board Replaceme

[SAMUEL_01]

Hello,

I own an HP 15s-du2099tu laptop, purchased in 2020. After a year, it experienced water damage, and the motherboard was replaced by an authorized technician. The technician mentioned that the water damage had also affected the speakers, so I was provided with a Bluetooth speaker instead. However, one day, the laptop's built-in speakers unexpectedly started working for a short time. Since then, the audio issue persists in the following way:

• After restarting the laptop, the speakers sometimes work, but if I play a video and it finishes, the sound stops again.
• Restarting doesn’t always fix the issue. Out of 10 restarts, the sound may work only 2 times.

Additionally, I am now facing two other issues:

1. Unlock Mode Message: Whenever I restart or turn on the laptop, I see the message: "MANUFACTURER PROGRAMMING MODE IS IN UNLOCK MODE." How can I resolve this?

2. Missing Serial Number: A few days ago, I contacted Microsoft support for the audio issue. Following their suggestion, I reset the laptop. Since then, my laptop's serial number seems to be missing, and I can no longer find it in:

   • HP Support Assistant
   • Command Prompt (CMD)
   • HP’s online identification system cannot recognize the product either.

3. WLAN Board Issue: A few days ago, while cleaning the laptop due to dust, I accidentally broke the WLAN board and one cable. I no longer have access to Wi-Fi and Bluetooth. Could anyone guide me on how to order a replacement WLAN board and cable in India?

I have attached screenshots of the relevant issues for reference.

Thank you in advance for your assistance!NO SERIAL NUMBERNO SERIAL NUMBER