iFixit - Answers With Device "HP ProBook 640"

HP ProBook 640: My brush cutter can not start.The spark plug is always wet with fuel.

Wed, 11 Mar 2026 20:00:46 -0700

Connect charger and orange light comes on but the screen is blank

⟐ Commented March 11, 2026 at 20:00 MST

HP ProBook 640: Why is touch pad not working clicking but pointer can move

Tue, 30 Sep 2025 21:59:10 -0700

my pc touch pad click buttons are not working but the cursor can move

HP ProBook 640: The brightness of the screen of my laptop is not working

Thu, 29 Aug 2024 17:38:45 -0700

The Brightness of my laptop screen is max but the light is not increasing

⟐ Commented August 29, 2024 at 17:38 MST

HP ProBook 640: Why does my laptop keep showing "application not found" after booting?

Sun, 28 Jul 2024 23:57:08 -0700

It keeps showing "application not found" after booting up with a file path above it saying "C:\System_Volume_Information\Jnt\uyjaxuh\bmz\explorer.exem" how do I solve this problem?

HP ProBook 640: How to repair Screen LCD light?

Fri, 31 May 2024 12:11:34 -0700

My laptop screen light is fully gone even the screen is fine with my mobile torch I can see a little, I have connected an external LCD with a VGA cable its working fine but the light on my laptop screen is gone, any idea how can I fix this without going to the repair man. because I went to the market he charged me 5k PKR for nothing and the screen light is as it was.

HP ProBook 640: 5g wifi network no show

Sat, 12 Aug 2023 21:20:12 -0700

5g wifi network no show

⟐ Commented August 12, 2023 at 21:20 MST