AC Adapter Test failed. Battery doesn't charge, but laptop can work when plugged in.

[Emvidasch]

Yesterday Windows 10 updated my laptop when I wasn't in the room and installed the KB4074588 update. While it was doing this and rebooring, the laptop went into the BIOS and started beeping (two long beeps, two short beeps). After rushing to it to see what was going on it shut down.

I restarted it, only to have the fans start blowing much harder than ever before. Again the BIOS popped up warning me the battery was at risk and I had to enable "Battery Safety Mode" within 30 seconds or it would shut down. Not wanting to risk anything I enabled it and the laptop shut down again.

When I restarted the laptop booted to Windows as usual, only the battery is no longer charging despite the AC Adapter being plugged in. It doesn't even say "Plugged in, not charging", Windows acts as if there's no power supply connected.

I tried troubleshooting the battery through the BIOS and it says it's fine, however it doesn't recognize being plugged in. Part of troubleshooting was disconnecting the battery and uninstalling the windows drivers before reinstalling but with no luck.

I then did another test through the BIOS for the AC Adapter and it returned the following error:

AC Adapter Test: FAILED

Failure ID: 9AP09F-85391H-XD7X76-C18303

Product ID: T7V77ES#ABB

It suggested seeking help from HP support. What I don't understand is that disconnecting the battery and have the laptop work on just the AC adapter works just fine. The AC Adapter just doesn't charge the battery anymore, but it can power the laptop.

Any help is greatly appreciated.

[Dragon-Fur · Accepted solution]

@Emvidasch

It sounds like the battery might have been determined by the system that the battery is at risk -- a number of workstations, some of Zbook 17 class included, might include a battery that is on a "recall" list.

• Advisory c05864001: HP Notebook Computer and Mobile Workstation Battery Safety Recall and Replacemen...

READ the document, then download and run the battery check:

• Calls: HP Notebook Computer and Mobile Workstation Battery Safety Recall and Replacement Program (Includes recall Battery Check download)

Especially if you are running the most recent BIOS (or at least one that recognizes the danger), the BIOS will take action to protect the electrical system from a potentially faulty battery.

This preventative "action" is to suggest / encourage / insist the OP (you) to enable the Battery Safety Mode.

My first suggestion is to contact HP Technical Support in your region.

If the Workstation is under still under warranty, use the workstation serial number to submit the case (do NOT post that information here).  Explain the situation and ask to be connected with Business / Home support for your business class workstation / computer.

If the Workstation is not under warranty, try using the information (alpha-numeric CT#) returned by the battery check. 

If you cannot in any way at all, contact HP Technical Support, please post back here.

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