iFixit - Answers With Device "Compaq Presario CQ40"

Compaq Presario CQ40: Why it turn off even though I already turn it on many times

Mon, 23 Feb 2026 17:26:59 -0700

i was trying to turn it on and leave it for awhile to let it charge but still the laptop didnt want to turn it on

⟐ Answered February 23, 2026 at 17:26 MST

Compaq Presario CQ40: If able to upgrade CPU

Sat, 01 Nov 2025 18:11:41 -0700

Hi, i recently found my old laptop and it have Intel Pentium and since i can access the motherboard i wonder if i can upgrade the CPU.

⟐ Commented November 01, 2025 at 18:11 MST

Compaq Presario CQ40: The system clock gets reset.

Sat, 29 Mar 2025 16:03:23 -0700

Whenever I shut down my laptop, the system clock gets reset. What could be the reason and please suggest the solution.

⟐ Commented March 29, 2025 at 16:03 MST

Compaq Presario CQ40: How can I clean cpu cooler system

Thu, 26 Dec 2024 17:38:59 -0700

The cpu getting hot and shut down

⟐ Answered December 26, 2024 at 17:38 MST

Compaq Presario CQ40: Why is my battery not charging

Fri, 13 Dec 2024 07:47:47 -0700

How i fix my loptap that cannot charge in if even the charger are conected my laptop doesn't work but if the battery is have charge its working

⟐ Commented December 13, 2024 at 7:47 MST

Compaq Presario CQ40: Blue Screen Flickers when I on my laptop

Thu, 03 Oct 2024 21:31:48 -0700

When I start my laptop the blue screen flickers and then the laptop restart again and again and the windows didn't start

Compaq Presario CQ40: In my laptop, is not turning on? Or powering on

Sun, 15 Sep 2024 09:42:53 -0700

The laptop is pastly but from sometime it get that many time the light of power button get on. But now no response.

⟐ Answered September 15, 2024 at 9:42 MST

Compaq Presario CQ40: Why my laptop's keyboard is not working

Wed, 28 Aug 2024 02:44:57 -0700

My keyboard of laptop is not working. Now how can i solve it

Compaq Presario CQ40: Dice boot manager missing

Fri, 14 Jun 2024 17:07:35 -0700

Dice boot manager missing

Compaq Presario CQ40: My laptop screen black but my power button still on

Fri, 07 Jun 2024 12:12:53 -0700

i want to ask how i want fix my laptop presario CQ41 because my laptop screen black but my power button still on...so how i want to fix?

⟐ Commented June 07, 2024 at 12:12 MST

Compaq Presario CQ40: My laptop is not turning on but it still charging

Sun, 29 Oct 2023 22:52:59 -0700

My laptop is not turning on but still charging

⟐ Answer edited October 29, 2023 at 22:52 MST

Compaq Presario CQ40: Loading vmlinuz a ok problem

Tue, 05 Sep 2023 01:42:56 -0700

You have this solve problem

Compaq Presario CQ40: My laptop is not working

Wed, 09 Aug 2023 22:34:40 -0700

sir the laptop is totally shut it's not oning

⟐ Commented August 09, 2023 at 22:34 MST

Compaq Presario CQ40: Unable to operate the hard disk

Tue, 22 Nov 2022 07:22:25 -0700

Well, my primary hard disk is failed and I cannot go into the software system. I want to take every memory from this device into another. Is it possible to run without the hard drive and take out my data?

⟐ Commented November 22, 2022 at 7:22 MST

Compaq Presario CQ40: How to buy a new display of this laptop

Thu, 22 Sep 2022 03:37:35 -0700

how to buy a new display

⟐ Answer edited September 22, 2022 at 3:37 MST

Compaq Presario CQ40: Power button is getting turn on and off after pressing it

Thu, 25 Aug 2022 08:18:04 -0700

Laptop is not getting started. Motherboard or CMOS checksum invalid showing sometimes

⟐ Commented August 25, 2022 at 8:18 MST

Compaq Presario CQ40: I want to ugrade my screen

Tue, 10 Mar 2020 14:21:52 -0700

i want to upgrade my screen model LTN141W1-L04(Samsung) 14.1”LCD (WXGA) 1280 x 800 30 pin to LED LCD LAYAR SCREEN LAPTOP 14" FHD (1920x1080) 30pin

can it work ?? how to do it ???

⟐ Answered March 10, 2020 at 14:21 MST

Compaq Presario CQ40: My cq40 does not recognize my hard drive

Sat, 01 Feb 2020 09:05:44 -0700

my cq 40 does not recognize my hard drive, it does not come up in the BIOS, what do i do

⟐ Answer accepted February 01, 2020 at 9:05 MST

Compaq Presario CQ40: Forgot boot up password

Sat, 16 Nov 2019 09:56:46 -0700

How do I get past the boot up password

⟐ Answered November 16, 2019 at 9:56 MST

Compaq Presario CQ40: What is the correct way to clean?

Fri, 18 Oct 2019 06:08:26 -0700

Hi, I have a laptop that I haven't cleaned for a long time, it works fine but I want to clean it to ensure its highest efficiency. Previously I used ethyl alcohol70% to clean it because there is no isopropyl alcohol in my area but I discovered that it has chemicals that affect To paint, so I want to know what the right and best way to clean it?? By cleaning I mean cleaning the screen, keyboard, motherboard, fan and other components?

⟐ Commented October 18, 2019 at 6:08 MST