<![CDATA[iFixit - Answers With Device "HP EliteBook 840 G2"]]> https://www.ifixit.com/Answers/Device/HP_EliteBook_840_G2?rss=yes en-US Thu, 23 Apr 2026 16:37:33 -0700 <![CDATA[HP EliteBook 840 G2: Battery changed with new one still not charging.]]> The battery is isn’t charging after placing a new battery in, it seems when the laptop is started it shows as charging then stops.

I have downloaded the HP assistant and done a battery check, the results come back as no battery detected?

I am not sure what the issue is, but we have also notice the date and time is out of sync and the laptop is only running on the AC charger, could this be an issue with the mother board?

⟐ Commented July 27, 2022 at 15:46 MST

]]> https://www.ifixit.com/Answers/View/717750/Battery+changed+with+new+one+still+not+charging. https://www.ifixit.com/Answers/View/717750 Wed, 27 Jul 2022 15:46:16 -0700 <![CDATA[HP EliteBook 840 G2: Won't power on, power and caps lock flash continuously]]> Computer won’t power on. When the AC adapter is plugged in, the power and caps lock lights flash white continuously, no pattern, just fast blinking. I have cleaned ram, switched slots, taken cmos battery out to wipe cmos. I have removed the battery and tried with just ac, yet nothing. Can anyone help me out?

⟐ Commented July 14, 2025 at 14:32 MST

]]> https://www.ifixit.com/Answers/View/678187/Won't+power+on,+power+and+caps+lock+flash+continuously https://www.ifixit.com/Answers/View/678187 Mon, 14 Jul 2025 14:32:00 -0700 <![CDATA[HP EliteBook 840 G2: How to change the hinges on a hp]]> I want to change the hinges so I can fold the keyboard/mouse pad area behind the screen and use the touch screen features.

⟐ Answered November 27, 2019 at 5:37 MST

]]> https://www.ifixit.com/Answers/View/603852/How+to+change+the+hinges+on+a+hp https://www.ifixit.com/Answers/View/603852 Wed, 27 Nov 2019 05:37:30 -0700 <![CDATA[HP EliteBook 840 G2: Why is my laptop not booting]]> I'm getting error GHSJ3K-000BM3-MFGK6J-40B903.The laptop is not booting

⟐ Answered June 27, 2023 at 2:37 MST

]]> https://www.ifixit.com/Answers/View/798673/Why+is+my+laptop+not+booting https://www.ifixit.com/Answers/View/798673 Tue, 27 Jun 2023 02:37:36 -0700 <![CDATA[HP EliteBook 840 G2: Fan specs and how to replace it]]> My Fan is not functioning. How to replace it

⟐ Answered October 15, 2025 at 3:58 MST

]]> https://www.ifixit.com/Answers/View/921949/Fan+specs+and+how+to+replace+it https://www.ifixit.com/Answers/View/921949 Wed, 15 Oct 2025 03:58:36 -0700 <![CDATA[HP EliteBook 840 G2: My new bought battery charges but unexpectedly shuts wile it has 70%]]> my new bought battery unexpectedly shuts down while it has more than 70% charge and it does not opens unless the charge is plugged in. please help me

⟐ Answered February 21, 2024 at 1:17 MST

]]> https://www.ifixit.com/Answers/View/837852/My+new+bought+battery+charges+but+unexpectedly+shuts+wile+it+has+70%25 https://www.ifixit.com/Answers/View/837852 Wed, 21 Feb 2024 01:17:25 -0700 <![CDATA[HP EliteBook 840 G2: How to Change operating system?]]> I wanted to change parrot operating system to window operating system

⟐ Answered September 30, 2023 at 17:58 MST

]]> https://www.ifixit.com/Answers/View/816720/How+to+Change+operating+system https://www.ifixit.com/Answers/View/816720 Sat, 30 Sep 2023 17:58:20 -0700 <![CDATA[HP EliteBook 840 G2: keyboard is not working]]> Some keys of keyboard is not working

⟐ Answered August 20, 2023 at 9:34 MST

]]> https://www.ifixit.com/Answers/View/808888/keyboard+is+not+working https://www.ifixit.com/Answers/View/808888 Sun, 20 Aug 2023 09:34:02 -0700 <![CDATA[HP EliteBook 840 G2: Why Ethernet yellow led always on?]]> Ethernet port yellow light always on....

⟐ Edited October 24, 2023 at 21:51 MST

]]> https://www.ifixit.com/Answers/View/820811/Why+Ethernet+yellow+led+always+on https://www.ifixit.com/Answers/View/820811 Tue, 24 Oct 2023 21:51:11 -0700 <![CDATA[HP EliteBook 840 G2: How to replace the cells of the battery]]> Replacing battery cells

⟐ Answered February 26, 2026 at 12:43 MST

]]> https://www.ifixit.com/Answers/View/942401/How+to+replace+the+cells+of+the+battery https://www.ifixit.com/Answers/View/942401 Thu, 26 Feb 2026 12:43:15 -0700 <![CDATA[HP EliteBook 840 G2: How to clean the screen inside]]> my screen is getting dirtied from the inside, is there a way to clean it safely?

⟐ Answered December 20, 2025 at 6:55 MST

]]> https://www.ifixit.com/Answers/View/931618/How+to+clean+the+screen+inside https://www.ifixit.com/Answers/View/931618 Sat, 20 Dec 2025 06:55:01 -0700 <![CDATA[HP EliteBook 840 G2: Why my laptop restart itself and display cmos reset (502) continuousl?]]> My laptop keep restarting and display cmos reset 502, but it is refurbished and the cmos removed full but before it worked well in last 6 months, there is no place of cmos what can i do??

⟐ Answered May 20, 2025 at 16:58 MST

]]> https://www.ifixit.com/Answers/View/900831/Why+my+laptop+restart+itself+and+display+cmos+reset+(502)+continuousl https://www.ifixit.com/Answers/View/900831 Tue, 20 May 2025 16:58:08 -0700 <![CDATA[HP EliteBook 840 G2: Why my laptop keeps shutting down despite having power in battery]]> I accidentally allowed foam cleaner to access the inside cover of my hp elite book 840 g2 and afterwards the battery has been behaving really awkwardly. every time i power it on without the AC adapter, it does not completely come on. it shuts down before completion of the power on process with a click sound . but whenever i use the adapter, there ain't such a problem. this happened immediately after exposure to the foam cleaner and has been the same ever since. i believe the motherboard is the one that was affected as it was close to the ventilation regions at the time of exposure. how should i go about this. please help.

⟐ Commented August 08, 2024 at 15:39 MST

]]> https://www.ifixit.com/Answers/View/863762/Why+my+laptop+keeps+shutting+down+despite+having+power+in+battery https://www.ifixit.com/Answers/View/863762 Thu, 08 Aug 2024 15:39:38 -0700 <![CDATA[HP EliteBook 840 G2: I want to switch to Linux(Ubuntu)]]> I want to switch to Linux but I am worried alot of my machines functions wont work due to drivers.

⟐ Commented January 14, 2024 at 16:14 MST

]]> https://www.ifixit.com/Answers/View/832195/I+want+to+switch+to+Linux(Ubuntu) https://www.ifixit.com/Answers/View/832195 Sun, 14 Jan 2024 16:14:53 -0700 <![CDATA[HP EliteBook 840 G2: My operating system is gone. How can I reinistall]]> I switched to an SSD drive. Things were going great. I guess I didn’t secure the drive when installed. Things got glitchy so I took off the back saw the drive was crooked. Pulled instead of pushed. Not the laptop can’t find my operating system.

⟐ Answered July 23, 2023 at 7:24 MST

]]> https://www.ifixit.com/Answers/View/803270/My+operating+system+is+gone.+How+can+I+reinistall https://www.ifixit.com/Answers/View/803270 Sun, 23 Jul 2023 07:24:05 -0700 <![CDATA[HP EliteBook 840 G2: How to repair laptop which does not start.]]> The laptop does not start. When connected to power there is blinking at the power button and the caps button

⟐ Answer edited March 23, 2023 at 2:46 MST

]]> https://www.ifixit.com/Answers/View/775039/How+to+repair+laptop+which+does+not+start. https://www.ifixit.com/Answers/View/775039 Thu, 23 Mar 2023 02:46:09 -0700 <![CDATA[HP EliteBook 840 G2: Bugging when plugin charger]]> Hello guys,

When I plug the charger the laptop is bugging.

I can't do anything. Everything is slow, even the START menu cant be launch.

But when I remove the charger Everything works fine. The problem is also I cant see the battery icon in taskbar and it going off without any notification of battery dischatging.

Please help

⟐ Answered August 23, 2022 at 12:44 MST

]]> https://www.ifixit.com/Answers/View/744522/Bugging+when+plugin+charger https://www.ifixit.com/Answers/View/744522 Tue, 23 Aug 2022 12:44:15 -0700 <![CDATA[HP EliteBook 840 G2: LCD Backlight Not Working]]> Problem: Computer turns on but there's no backlight. The screen is on and working when I point a flashlight on it.

Diagnosis: short-fuse/capacitor needs replacement.

Note: All related software / OS / Bios based approaches have been exhausted.

Any help with the LCD screen circuit board and fuse/capacitor replacement steps will be deeply appreciated.

Details:

  1. HP EliteBook 840 G2
  2. Core i5
  3. Intel Graphics - 1366 x 768

⟐ Answer edited July 19, 2021 at 6:48 MST

]]> https://www.ifixit.com/Answers/View/699621/LCD+Backlight+Not+Working https://www.ifixit.com/Answers/View/699621 Mon, 19 Jul 2021 06:48:02 -0700 <![CDATA[HP EliteBook 840 G2: Trying to change the SSD]]> I am trying to change SSD due to the original having limits and being blocked. Tried replacing with two separate and neither seem to register or work.

Original works, so I was wondering where I was going wrong

⟐ Answered February 03, 2021 at 10:19 MST

]]> https://www.ifixit.com/Answers/View/631009/Trying+to+change+the+SSD https://www.ifixit.com/Answers/View/631009 Wed, 03 Feb 2021 10:19:24 -0700 <![CDATA[HP EliteBook 840 G2: Hardware Diagnostics Error UEFI]]> Everytime I am turning on my HP elitebook it is showing HP PC Hardware Diagnostics UEFI. Why it is showing it and also some of my keyboard keys including ENTER key is malfunctioned

]]> https://www.ifixit.com/Answers/View/948694/Hardware+Diagnostics+Error+UEFI https://www.ifixit.com/Answers/View/948694 Sun, 05 Apr 2026 02:38:44 -0700