My laptop won't turn on. Only the white LED is flashing. Can you help? I've already flashed a different BIOS and EC, but it didn't help. I'm attaching the original BIOS and EC.
HP ProBook 440 G9
-
My laptop won't turn on. Only the white LED is flashing. Can you help? I've already flashed a different BIOS and EC, but it didn't help. I'm attaching the original BIOS and EC.
HP ProBook 440 G9
-
-
Hi guys,
first i'm very surprised with all of those hp bios VERSION where do you find them ?.
can someone please link me the bios + ec + whatever for my
HP ProBook 440 G9
S:/N 5CD225GJHK
P Model 6J3K6EC#ABF
Machin is halted on hp sure start detected an unauthorized change to the secure boot keys. and then just have esc or ok, then the nb reboots
I'll try to make an offline bios update.
Thanks so much.Comment
-
Hello everybody, can someone help me fix these files? Laptop takes a long time to get to logo, and doesn't boot into Windows. Also when in BIOS I noticed that the reaction time of changing taps, or using the mouse takes a long time. I like to try BIOS flash, but something tells me that this also could be a hardware issue.
HP ProBook 440 G9
SN: 5CD24972S6
DAX8SFMB8B1 REV B.
ID: 6d219EA#ABHComment
-
LBTT1121, thank you for the fast help.
It didn't fix the problem. First reboot showed next message:
HP Sure Start detected corruption in the intel Management Engine Firmware.
Select Continue to complete the full recovery process of the Intel Managament Engine Firmware.
I selected yes, but as I stated it didn't fix the problem.
Could it be an hardware issue?
Comment
-
plz remove password
hp probook 450 g9
sn=5CD32777PK
BOARD NO=DAX8SFMB8B1 REV.B
Comment
-
Hp Probook 450 G7 s# SCD0348W35 had a locked BIOS. Bought BIOS and EC chips off Ebay that were supposed to match this machine - the 450 G7. Flashed in the BIOS on chip i bought using a CH341. BIOS unlocked next boot. Some error to contact HP. Entered BIOS and reset to system defaults and rebooted. Machine worked fine but every cold boot the contact HP message popped and everything else worked as fine. Assumed the error was from EC chip not matching BIOS that i just flashed in. So i flashed in the EC that was supposed to match from the EBay chip i bought and instant brick.
Ive got...07-08-2025, 09:24 PM -
Hello everyone,
I’m currently working on a dead MSI GP75 Leopard (MS-17E71) motherboard (i7 CPU, NVIDIA GPU) with a no display/no backlight issue initially. After extensive investigation, I’m at a critical stage involving EC firmware, BIOS/ME region interaction, and possible deep corruption. I'm seeking advanced insight from anyone with experience in EC/BIOS sync issues or PCH-level behavior. Here’s a full breakdown:
🧩 Initial Issue- Board powers on (fans spin, keyboard lights up and can be adjusted, caps lock led lights), but no display or backlight
- External display (HDMI) shows
07-24-2025, 02:17 PM -
Hello everyone,
I recently bought a non-working Asus Zenbook Pro Duo OLED UX8402ZA that was listed for parts only. The seller mentioned that it had no display output but that the charging lights worked.
When the laptop arrived (without a charger and SSD), I connected a charger and confirmed with a multimeter that it was charging the battery. However, when I tried to power it on, only the backlight of the secondary display came on. There was no image, and it didn’t boot into the BIOS.
I decided to try flashing a new BIOS, but since I didn’t want to desolder... -
First of all thanks to all of our members who have posted previously all methods posted here.
Please leave a comment if you find something new,or have anything else to add.
-----------------------------------------------------------------------------------------
Find by serial number,model number or series
If you know the laptop serial or model number go to HP support https://support.hp.com/us-en/drivers/laptops .
Enter the serial number or model number and click submit.On the next screen you will have to enter the OS
Operating system and OS version.If... -
I'm requesting a bios .bin for 2 of my hp Probook 450 G3's. Both of which I had forgotten the bios passwords. I stupidly flashed both of them with firmware "made" by the RCUnlocker software and I guess I shouldn't have. The last thing I did was flash both of them with RCUnlocker-fw thinking it would 100% work and left my programmer etc behind and won't have access to them for another 2 days so I figured I'd create a thread to see if I'd be so lucky that someone might have a working file laying around 😝
Laptop number 1:
Model: HP ProBook 450 G3
Motherboard part number:...
Comment