iFixit - Answers With Device "HP ProBook 645 Series"

HP ProBook 645: How to remove and change the CMOS for HP PROBOOK 645 G1

Thu, 27 Jul 2023 01:19:54 -0700

How do I remove and replace the CMOS battery of HP probook 645 G1 laptop

⟐ Commented July 27, 2023 at 1:19 MST

HP ProBook 645: How to reset BIOS password

Fri, 24 Sep 2021 00:24:44 -0700

The BIOS password for this laptop is on a chip (non-volatile memory) so it’s almost impossible to reset.

It should be possible using the HPBR (HP bios reset utility) which creates a bootable DOS application.

I’m creating the bootable utility, but the device doesn’t seem to recognize is on any USB port. I’m stuck there. Any ideas?

⟐ Answer edited September 24, 2021 at 0:24 MST

HP ProBook 645: I forget the password of Bios

Thu, 14 Nov 2024 15:06:11 -0700

I try to reset the password of BIOS , there is no result until no , I need the someone have the same problem, give me a solution.

⟐ Answer edited November 14, 2024 at 15:06 MST

HP ProBook 645: Touch pad for hp probook 6450b

Sat, 26 Aug 2023 05:40:17 -0700

How do I change the touch pad for my hp probook 6450b.

Thank You

⟐ Answer accepted August 26, 2023 at 5:40 MST

HP ProBook 645: How to remove and replace cracked screen on HP Probook 645?

Sat, 20 Nov 2021 05:29:09 -0700

I have an HP Probook 645 with a cracked screen. How do I remove it and replace the screen so that the unit will function again?

⟐ Answer deleted November 20, 2021 at 5:29 MST

HP ProBook 645 G4: Why aren't some keys on my keyboard working

Fri, 07 Nov 2025 17:42:00 -0700

Why aren't some keys working like A, 8 and other keys

⟐ Answer edited November 07, 2025 at 17:42 MST

HP ProBook 645: My PC does not turn on when power button is pressed

Sun, 06 Apr 2025 04:22:24 -0700

When you press power button, it displays the yellow light then off. It does this repeatedly until you force it to turn off by holding the power button

⟐ Commented April 06, 2025 at 4:22 MST

HP ProBook 645: “The computer suddenly turned off while it was working.”

Thu, 02 Apr 2026 12:19:58 -0700

“The computer suddenly turned off while it was working.”

⟐ Edited by author April 02, 2026 at 12:19 MST

HP ProBook 645 G2: Screen doesn't turn on

Sun, 23 Nov 2025 15:29:42 -0700

When i try to turn on my pc the keyboard and the fan works and the fan works too loud but the screen doesn't work and stay black

HP ProBook 645: How to open the screen

Thu, 10 Apr 2025 16:27:33 -0700

How to open the screen

⟐ Commented April 10, 2025 at 16:27 MST

HP ProBook 645: Power Regulator or IC

Thu, 31 Oct 2024 03:22:10 -0700

My PC is HP ProBook 645. I plugged in a charger that produces less voltage than required. Finally, the power Regulator/IC which is connected to the source power terminal got burned such that the serial number cannot be seen and the PC is not turning ON. (I don't know even the serial number of the PC generally). If anyone has a similar laptop HP ProBook 645 please help me with the serial number of power Regulator/IC.

⟐ Commented October 31, 2024 at 3:22 MST

HP ProBook 645 G2: keyboard problem about one of the key's not working

Sun, 21 Jul 2024 08:15:41 -0700

the problem is, i was playing a game normally with my arrows and suddenly one of the arrows stop working (the down one to be specific) first thing that came to my mind when this happen is just to go and fix it, i mean it's just 1 key after all it wouldn't take much money to fix, but the shop told me to change the whole keyboard, so i decided to fix it by myself and i figured out what is the problem is that white small thing under the key got cut off for some reason, so i want to ask can i replace this with another one of those white things from other key on my keyboard is it safe anyways?

HP ProBook 645 G4: My laptop is very laggy

Mon, 27 May 2024 07:17:56 -0700

I want to play games and it’s really laggy whenever I open something it takes a minute to open

⟐ Commented May 27, 2024 at 7:17 MST

HP ProBook 645: Why does my laptop turn on and off time keep increasing as I leave it?

Sun, 02 Oct 2022 01:12:52 -0700

My laptop was stuck with a blinking power light before I switched it off by removing the battery. Now, it turns on and off almost immediately but the tricky thing is with each turn on, the boot time increases before it turns off