AC adapter makes high pitched sound

[Sxord]

My laptop was fully charged and all of a sudden the AC adapter started to make a high pitched sound. After removing the 'charge plug' the sound dissapeared after roughly 3 seconds. The adapter still felt as cold as it does when it was not in use.

When my laptop stays at home it usually is plugged in with the AC adapter all day out of comfort. Previously i was reassured this should not be a problem, but this sound came. The chargers has not fallen from  a distance greater than 2 cm and has not been exposed to any water whatsoever.

I am still under warranty, but can not wait for a new AC adapter to arrive due to a project which will be finished within 2 weeks. When the project is done I can so until then I will not replace it if it does not pose a threat.

My questions are:

• Is my AC adapter defect?
• Can this be a fire hazard?

and if it is indeed defect:

• Is an immediate replacement necessary?
• How can I get a replacement for a single component?

[Dragon-Fur · Accepted solution]

@Sxord

No one on this forum can diagnose your AC adapter.

You can do this yourself to the extent that it is possible:

Purchasing a Replacement AC Adapter

You can also test / calibrate the battery:

Accepted Solution - Battery won't Charge or Battery won't Hold a Charge

The solution includes a link to an article that explains Smart Battery Technology:  Battery use and care, how batteries perform over time, and expected battery life.

Battery having trouble?

The battery might be OK and just need calibration (balance / set).

The steps to check / calibrate / replace the battery are included in this document:

HP Notebook PCs - HP Battery Alert Appears Before Windows Starts

Calibrate the Battery -- Link for Windows 10:

Testing and Calibrating the Battery (Windows 10)

Document includes information and link for using HP PC Hardware Diagnostics (UEFI) and / or using the HP Support Assistant to test the battery.

If you determine that you need to purchase a battery or ac adapter for your computer, you may find the part(s) in HP PartSurfer.

Open PartSurfer

• Select your Country
• Enter your device Product Number, Serial Number, or Part Number in the Quick Search box
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Parts marked as available for purchase might be available from:  HP Parts Store

OR

Use your search engine to find the part at your favorite online store.

The battery might be on a Recall List:

HP Replacement programs and product recalls

Semi-Related:

HP Notebook PC AC Power Cord Safety Recall and Replacement Program - August 26, 2014

No one on this forum can do more than offer a personal opinion about whether the AC adapter or any part of your computer's electrical system is safe to use.   We are volunteers working in a community forum.  We are not HP Tech Support. 

Because you are indeed under warranty, please take the time to contact HP Technical Support in your region - speak to an authorized HP agent and ask about your options.

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