<![CDATA[iFixit - Answers With Device "HP ProBook 640 Series"]]> https://www.ifixit.com/Answers/Device/HP_ProBook_640_Series/All?rss=yes en-US Sat, 25 Apr 2026 22:42:21 -0700 <![CDATA[HP ProBook 640 G5: My laptop is not turning on and prees power butoon 5 to 10 second and]]> My laptop not turning on and power butoon prees to 5 to 10 sec and blink coas lock linght 1 time long

]]> https://www.ifixit.com/Answers/View/948357/My+laptop+is+not+turning+on+and+prees+power+butoon+5+to+10+second+and https://www.ifixit.com/Answers/View/948357 Fri, 03 Apr 2026 04:35:08 -0700 <![CDATA[HP ProBook 640 G2: bluetooth is not working]]> bluetooth is not working

]]> https://www.ifixit.com/Answers/View/946765/bluetooth+is+not+working https://www.ifixit.com/Answers/View/946765 Wed, 25 Mar 2026 06:28:21 -0700 <![CDATA[HP ProBook 640: My brush cutter can not start.The spark plug is always wet with fuel.]]> Connect charger and orange light comes on but the screen is blank

⟐ Commented March 11, 2026 at 20:00 MST

]]> https://www.ifixit.com/Answers/View/944368/My+brush+cutter+can+not+start.The+spark+plug+is+always+wet+with+fuel. https://www.ifixit.com/Answers/View/944368 Wed, 11 Mar 2026 20:00:46 -0700 <![CDATA[HP ProBook 640 G4: I have an laptop hp probook 8th, it doesn't open … When I connect the]]> I have an laptop hp probook 8th, it doesn't open … When I connect the charger, it flashes in two colors white and yellow, and caps look press switch illuminates and turns off

⟐ Commented December 19, 2025 at 22:17 MST

]]> https://www.ifixit.com/Answers/View/808767/I+have+an+laptop+hp+probook+8th,+it+doesn't+open+%E2%80%A6+When+I+connect+the https://www.ifixit.com/Answers/View/808767 Fri, 19 Dec 2025 22:17:17 -0700 <![CDATA[HP ProBook 640 G5: How can I fix ic power because my computer does not power on]]> My pc is only showing a light on a power button only, and i tried to plug in the charge it looks like nothing because even the led lingt does not light. Pleas

⟐ Answered December 06, 2025 at 8:33 MST

]]> https://www.ifixit.com/Answers/View/929290/How+can+I+fix+ic+power+because+my+computer+does+not+power+on https://www.ifixit.com/Answers/View/929290 Sat, 06 Dec 2025 08:33:42 -0700 <![CDATA[HP ProBook 640 G4: Laptop screen is blinking]]> How to repair laptop screen blinking

⟐ Answered December 03, 2025 at 16:52 MST

]]> https://www.ifixit.com/Answers/View/928989/Laptop+screen+is+blinking https://www.ifixit.com/Answers/View/928989 Wed, 03 Dec 2025 16:52:45 -0700 <![CDATA[HP ProBook 640: When I turn on my computer, the fan makes a loud noise and there are l]]> When I turn on my computer, the fan makes a loud noise and there are l

Update (04/30/25)

When I turn on my computer, the fan makes a loud noise and there are light in capslock keyboard and scroll

⟐ Answered November 29, 2025 at 11:20 MST

]]> https://www.ifixit.com/Answers/View/898265/When+I+turn+on+my+computer,+the+fan+makes+a+loud+noise+and+there+are+l https://www.ifixit.com/Answers/View/898265 Sat, 29 Nov 2025 11:20:23 -0700 <![CDATA[HP ProBook 640: Why is hp probook 640 G1 blinking]]> My laptop is blinking every 1 or 2 Second and screen turn into black and stop working then again normal can i fix it

⟐ Answered November 14, 2025 at 23:04 MST

]]> https://www.ifixit.com/Answers/View/865568/Why+is+hp+probook+640+G1+blinking https://www.ifixit.com/Answers/View/865568 Fri, 14 Nov 2025 23:04:23 -0700 <![CDATA[HP ProBook 640 G5: My laptop is not powering on]]> My laptop is not powering on but show light on power button

⟐ Commented October 13, 2025 at 2:51 MST

]]> https://www.ifixit.com/Answers/View/921560/My+laptop+is+not+powering+on https://www.ifixit.com/Answers/View/921560 Mon, 13 Oct 2025 02:51:24 -0700 <![CDATA[HP ProBook 640 G2: Slow when turning on]]> My laptop is taking forever to turn on when you power it off it takes forever to turn on

]]> https://www.ifixit.com/Answers/View/920840/Slow+when+turning+on https://www.ifixit.com/Answers/View/920840 Tue, 07 Oct 2025 09:25:07 -0700 <![CDATA[HP ProBook 640: Why is touch pad not working clicking but pointer can move]]> my pc touch pad click buttons are not working but the cursor can move

]]> https://www.ifixit.com/Answers/View/919884/Why+is+touch+pad+not+working+clicking+but+pointer+can+move https://www.ifixit.com/Answers/View/919884 Tue, 30 Sep 2025 21:59:10 -0700 <![CDATA[HP ProBook 640 G2: Why my pc screen won’t turn on?]]> My laptop screen doesn’t turn on but the lights on the power button and Caps Lock show. I connect to my tv and the screen displayed on the tv.

⟐ Commented September 15, 2025 at 11:39 MST

]]> https://www.ifixit.com/Answers/View/869552/Why+my+pc+screen+won%E2%80%99t+turn+on https://www.ifixit.com/Answers/View/869552 Mon, 15 Sep 2025 11:39:43 -0700 <![CDATA[HP ProBook 640: How do I replace my keyboard because it ain't responding at all]]> Keyboard replacement

⟐ Answer edited September 15, 2025 at 1:13 MST

]]> https://www.ifixit.com/Answers/View/917290/How+do+I+replace+my+keyboard+because+it+ain't+responding+at+all https://www.ifixit.com/Answers/View/917290 Mon, 15 Sep 2025 01:13:26 -0700 <![CDATA[HP ProBook 640 G3: Why my pc wont start]]> When i power on my pc lights on, a black screen with continously beep sounds.How am i suppossed to fix it??

⟐ Commented July 25, 2025 at 23:03 MST

]]> https://www.ifixit.com/Answers/View/896955/Why+my+pc+wont+start https://www.ifixit.com/Answers/View/896955 Fri, 25 Jul 2025 23:03:09 -0700 <![CDATA[HP ProBook 640: On pressing power button lights blinking unlimited times , not on lapt]]> On pressing power button my laptop power button and other wifi and speaker + chargin lights keeps on blinkg , but laptop is not turning on I have tried all possible methods, removed RAM , SSD, Pressed power button for 60 seconds, then plugged in power and turned on but nothing working, tried to flash new bios using usb , it is also not working

⟐ Answered July 19, 2025 at 13:38 MST

]]> https://www.ifixit.com/Answers/View/908203/On+pressing+power+button+lights+blinking+unlimited+times+,+not+on+lapt https://www.ifixit.com/Answers/View/908203 Sat, 19 Jul 2025 13:38:17 -0700 <![CDATA[HP ProBook 640 G2: My PC won't connect to the Internet]]> Pls help me solve the issues

⟐ Commented July 14, 2025 at 4:46 MST

]]> https://www.ifixit.com/Answers/View/907327/My+PC+won't+connect+to+the+Internet https://www.ifixit.com/Answers/View/907327 Mon, 14 Jul 2025 04:46:42 -0700 <![CDATA[HP ProBook 640 G5: Laptop screen bot working, but external monitors are working.]]> Hi everyone,

I’m having trouble with my HP ProBook 640 G5 internal display after a near-drop incident. Here’s exactly what happened:

  • The laptop and charger fell — I managed to catch the laptop, but the charger hit the ground.
  • Right after, both the internal and external screens went blank with white screen.
  • The external monitor recovered, but the laptop’s built-in screen remained blank.

What I’ve tried so far:

  • Disassembled the laptop and unplugged/replugged the display cable on both the screen side and the motherboard side.
  • Updated the BIOS, Intel graphics drivers, and display-related firmware.
  • Ran HP Hardware Diagnostics — the internal screen does not show up in detected devices.
  • Attempted to enter BIOS and UEFI diagnostics with only the internal screen connected — nothing displays.
  • Verified that the external screen works fine via HDMI, so the GPU is not dead.

Current symptoms:

  • No image, no backlight, and no faint picture on internal screen (even when using a flashlight).
  • Windows doesn’t detect the internal display.
  • Device Manager shows only the external monitor.
  • I’ve confirmed cable is seated properly, and no visible damage.

I’m trying to determine:

  1. Could the internal screen panel be dead even though it wasn’t directly hit?
  2. Could the LCD cable have been damaged internally during the jolt?
  3. Is it possible the motherboard display circuit or eDP connector was affected?

Any advice on how to pinpoint the failed component would be really appreciated — I don’t want to replace parts blindly. If anyone has a pinout diagram for the display connector or voltage values to test with a multimeter, that would be helpful too.

Thanks in advance!

⟐ Commented June 22, 2025 at 7:12 MST

]]> https://www.ifixit.com/Answers/View/904622/Laptop+screen+bot+working,+but+external+monitors+are+working. https://www.ifixit.com/Answers/View/904622 Sun, 22 Jun 2025 07:12:06 -0700 <![CDATA[HP ProBook 640 G3: Why is my laptop not charging]]> When I am plugging the charger in the laptop's charging light blinks 3 to 4 times and it doesn't catches the charger

]]> https://www.ifixit.com/Answers/View/903100/Why+is+my+laptop+not+charging https://www.ifixit.com/Answers/View/903100 Mon, 09 Jun 2025 01:45:21 -0700 <![CDATA[HP ProBook 640 G2: Why is my touchpad right key not working?]]> Plz Help me with this

]]> https://www.ifixit.com/Answers/View/901995/Why+is+my+touchpad+right+key+not+working https://www.ifixit.com/Answers/View/901995 Fri, 30 May 2025 05:05:41 -0700 <![CDATA[HP ProBook 640 G2: How to solve pin is not available]]> How can I solve the problem pin is not available?

⟐ Commented May 22, 2025 at 17:09 MST

]]> https://www.ifixit.com/Answers/View/901068/How+to+solve+pin+is+not+available https://www.ifixit.com/Answers/View/901068 Thu, 22 May 2025 17:09:08 -0700