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
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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.โComment
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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,
Iโm 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, Iโm 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. Hereโs a full breakdown:
๐งฉ 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 -
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.
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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 ๐
Laptop number 1:
Model: HP ProBook 450 G3
Motherboard part number:... -
Hi, my laptop wont boot at all
With original bios no POST, only LED lights
With alternative BIOS from model TP500LN (flashed via programmer) the notebook works again
Some issues
A- with bios from 500LN, it won't update from bios of model 500LA (from 500LN v203 to 500LA v300)
B- If updated from 500LN version 203 to 300, the battery stops being recognized
Things I tried
1- Update / clear ME: Took the non working bios, made a backup, and did this: https://www.badcaps.net/forum/troubl...theory/trouble...
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