iFixit - Answers With Device "HP ProBook 450 Series"

HP ProBook 450 G2: HP Probook 450 G2 continuous light power and caps lock

Sat, 20 Sep 2025 07:07:20 -0700

Hi help

Laptop not switching on

Blank screen and continuous glow of Power button and Caps lock (no blinking sequence) when connected to a/c

What i have tried with no success

Remove battery and connect a/c
Reseat RAM
Remove power source and press power button for 20 seconds

regards

heres what its showing

⟐ Answered September 20, 2025 at 7:07 MST

HP ProBook 450 G4: Laptop will not power on

Wed, 15 Mar 2023 12:00:59 -0700

When I plug in my laptop in the power button and the caps lock button light up for a second or 2 then go out. Then the power button and the wifi and the mute button come on for a second or 2 then go out. This happens twice then the laptop becomes unresponsive. I have replaced the power supply but it still acts the same. I have tried the 30 second power button reset and no luck. Any ideas on what to do next?

⟐ Answered March 15, 2023 at 12:00 MST

HP ProBook 450 G1: My screen is glitching

Sat, 24 Aug 2024 06:01:33 -0700

Screen keeps glitching after cable repair

⟐ Answered August 24, 2024 at 6:01 MST

HP ProBook 450 G4: Why my pc automatically entering bios mode, when turning it on

Wed, 10 Jul 2024 23:02:50 -0700

My pc entering bios setup when turning it on

⟐ Commented July 10, 2024 at 23:02 MST

HP ProBook 450 G5: Won't turn on or charge.

Thu, 12 Mar 2026 13:26:03 -0700

My laptop won't turn on or charge. No indicator light. Checked the cable and used another known working cable and still nothing. Does anyone know what the issue is?

⟐ Commented March 12, 2026 at 13:26 MST

HP ProBook 450 G5: POST Error hp The system has detected that a cooling fan is not oper

Mon, 23 Oct 2023 08:17:39 -0700

POST Error

The system has detected that a cooling fan is not operating correctly.

Continued operation is not recommended and may cause unpredictable behavior that could result in random shutdown, data loss or possible system damage. The system will shut down in 15 seconds. To prevent shutdown and continue operation, press the enter key now.

System Fan (90B)

For more information, please visit: www.hp.com/go/techcenter/startup

⟐ Commented October 23, 2023 at 8:17 MST

HP ProBook 450 G5: Replacement battery for HP ProBook 450 G5

Mon, 06 Dec 2021 11:26:22 -0700

What replacement battery do I need for the HP ProBook 450 G5?

⟐ Answer accepted December 06, 2021 at 11:26 MST

HP ProBook 450 G6: Laptop is,not turning even the power light is not on

Tue, 05 Aug 2025 02:10:45 -0700

Laptop is,not turning even the power light is not on

⟐ Answer accepted August 05, 2025 at 2:10 MST

HP ProBook 450 G1: How to replace the hard drive?

Sat, 19 Jul 2025 09:45:43 -0700

I wanted to play on my laptop, but the laptop says bootdevice not found error. I found a solution, but I don't know how to do this.

⟐ Answered July 19, 2025 at 9:45 MST

HP ProBook 450 G7: My display screen needs replaced

Wed, 16 Apr 2025 07:16:34 -0700

I have been advised to get a screen replacement kit, do you sell them?

⟐ Answer accepted April 16, 2025 at 7:16 MST

HP ProBook 450 G2: I can't access my primary partition.

Wed, 18 Aug 2021 19:41:20 -0700

I had an “UNMOUNTABLE BOOT VOLUME” blue screen recently. How do I fix it without losing my files on the primary drive? I've partitioned my hard drive into two.

⟐ Answered August 18, 2021 at 19:41 MST

HP ProBook 450 G2: earphone jack not working properly

Wed, 30 Apr 2025 16:27:18 -0700

how to solve this

⟐ Answered April 30, 2025 at 16:27 MST

HP ProBook 450 G7: My laptop keeps overheating and shutting down

Thu, 17 Apr 2025 06:26:06 -0700

my laptop keeps overheating and it shuts down after only 25 to 30 minutes of usage without even giving me a warning

⟐ Answer accepted April 17, 2025 at 6:26 MST

HP ProBook 450 G8: Why is My laptop power light connecter blinking?

Thu, 09 Jan 2025 17:32:26 -0700

My HP ProBook 450 G8 charging light blinking after few seconds no sign of light blinking and not turn On please help me fix it.

⟐ Commented January 09, 2025 at 17:32 MST

HP ProBook 450 G4: pls I forgot my bios password and my laptop is locked how can I unlock

Tue, 21 May 2024 06:21:53 -0700

Pls my system keeps restarting I can remember the password and also I want to know how to reset the bios password if what I think is the password is incorrect also

⟐ Answered May 21, 2024 at 6:21 MST

HP ProBook 450 G2: How do you clean the fan?

Tue, 01 Jun 2021 07:42:46 -0700

I’ve had my laptop for 4 years now and the fan is always ramped up at max, making it very loud and whinny. I have never cleaned it, but I feel like its about time I did, and get to see if that problem goes away. Thoughts?

⟐ Answer accepted June 01, 2021 at 7:42 MST

HP ProBook 450 G8: Why is my laptop showing a blank screen on dispay but also showing the

Mon, 29 Dec 2025 07:29:38 -0700

Why is my laptop showing a blanck screen but showing the hp logo when switching on

HP ProBook 450 G5: keyboard keys not working

Fri, 07 Nov 2025 04:37:43 -0700

Hi

Several keys of the keyboard are not working well. Some need to be clicked severall times with more pressure to work.

Can it be completely changed?

⟐ Answered November 07, 2025 at 4:37 MST

HP ProBook 450 G7: Why my charger indictor light show but not turn on

Wed, 08 Oct 2025 00:54:50 -0700

how to i fix my laptop when charging indictor light on but i try to switch on but never turn on?

⟐ Answer accepted October 08, 2025 at 0:54 MST

HP ProBook 450 G2: My Laptop is not switching on

Tue, 04 Mar 2025 10:15:00 -0700

My laptop is not switching on

It has a Blank screen with the power glow on the charging port on, but without the glow of the Power button Caps lock (no blinking sequence) when connected to a/c

I have tried to Remove the power source and press the power button for 20 seconds with no success

regards

⟐ Answered March 04, 2025 at 10:15 MST