iFixit - Answers With Device "HP ProBook 450 G4"

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 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 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 G4: Cooling Fan is running high speed but laptop did't turn on

Tue, 07 Nov 2023 02:06:39 -0700

My laptop shuddenly keep shut down...when i start it cooling fan spin in high speed but laptop didn't turn on..If by chance it turn on..it auro shut down again..

⟐ Answered November 07, 2023 at 2:06 MST

HP ProBook 450 G4: Computer will not start up

Sat, 26 Nov 2022 14:48:50 -0700

Computer will not start up

⟐ Answered November 26, 2022 at 14:48 MST

HP ProBook 450 G4: Screen is flickering. How do I fix it?

Wed, 28 Apr 2021 07:54:06 -0700

Before I forget: I’ve actually got the HP Probook 450 G5, but couldn’t select that one so I figured this one was the closest to it.

Hi! Since a week or two my screen has started flickering occasionally, dependent on the angle it’s in. Once it does I just have to tilt it a little back or forth to find a non-flickering position. Not a pro whatsoever, but this has lead me to believe the issue may be my display cable a) not connecting fully on either side or b) being worn out/damaged. Am I correct that it most likely is the display cable and, if so, which of the two options would you guess? It’s only about 3 years old, but I do carry it in a not incredibly protective bag quite often.

Also, is this issue (or the issue you suspect it is) worth fixing myself, or should I go to a professional? I’d describe myself as unexperienced yet curious with a pretty good ability of understanding tech(nical information). Only experience with electronics was fixing my OnePlus' charging port, volume buttons and speaker. Though I did end up not properly reconnecting the two buttons next to the home button & wearing out one screw, so I ended up leaving them disconnected. I think that about describes my ability, lol. But really it was fun, I will make sure to take more care now, and I will buy an extra set of screws.

Then, for the repair: how should I go about it, and what tools do I require? Any videos to watch, or guides to read? Tips for buying parts, shipped to The Netherlands? And anything I should absolutely not cheap out on?

⟐ Commented April 28, 2021 at 7:54 MST

Hp probook 450 G4: Auto start when charger connected

Fri, 11 Aug 2017 00:38:29 -0700

My Hp probook 450 G4 is auto starting when charger connected. it starting from switching off mood. is it ok?