[B]Seems like the CH341A BIOS programmer (black) is already suffering from all the plugging. :S
Working now. [COLOR=#e74c3c]But I get a "Missing unlockable content" when using RCUnlocker.[/COLOR][/B]
I tried reading a "25L12873F" on a 840 G2 with NeoProgrammer, which already came with a 2020 BIOS.
While reading it, NeoProgrammer says "Disconnected / not responding" and "Detects" it as different chip every time.
So, as this 840 G2 has the "25L12873F" instead of a "25Q128FVSQ" I tried shortcutting Pin...
STKR123
Member
Last Activity: 12-14-2024, 02:08 PM
Joined: 06-03-2023
Location: State
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My 1st experiments with a cheap CH341A programmer + clamp + old hp EliteBooks.
The clamp is indeed pure horror at times and probably wont last very long.
But RCUnlocker works like a charme!
Thank you so much!...Leave a comment:
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Could be 1st and last try though.
Sadly those old masterpassword-times, like "lkwpeter", are long gone. ^^
I also stumbled across the Master Password Generator on github, but I guess RCUnlocker is the way of choice for Elitebooks 820 and 840.
[url]https://github.com/bacher09/pwgen-for-bios[/url]
Will have to check. Haven tried multiple wrong passwords in a row yet.
This youtuber shortcuts the CMOS battery pins. (battery not connected) I guess that would be the same as keeping the power button pressed for 30 seconds?...Leave a comment:
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I just realised I have a Elitebook 820 without the G1 on the label. So it is just a 820. (?)
[B]But yes, it worked indeed![/B]
I guess 840 G1 and 840 G2 wont like this "technique"? Also these do have 2 BIOS chips?I just realised I have a Elitebook 820 without the G1 on the label. So it is just a 820. (?)
[B]But yes, it worked indeed![/B]
I guess 840 G1 and 840 G2 wont like this "technique"? Also these do have 2 BIOS chips?I just realised I have a Elitebook 820 without the G1 on the label. So it is just a 820. (?)
Leave a comment:
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Using a noname (Yisbat) 65W Adapter 19,5V 3,33A the 820 turns on instantly every single time.
Still showing the CMOS Checksum error, but what do these Elitebooks are looking for?
Also I stumbled across this [B]"shortcut pin 7 & 8 on BIOS chip [U]while beeing in the System Info Screen[/U] -> F1 -> F10 = Voila.[/B]
Im scared to try it though.
[URL]https://www.youtube.com/watch?v=kc4lIC-EsaE[/URL]Using a noname (Yisbat) 65W Adapter 19,5V 3,33A the 820 turns on instantly every single time.
Still showing the CMOS Checksum error, but what doLeave a comment:
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By now it has the look and feel, that it might be indeed connected to the powersupply. My original HP power supply seems to be faulty.
Using a very old 19,5V 3,3A DELL powersupply today, 1 out of 100 tries it suddenly switched on, showing a CMOS checksum (502) error.
This still does look like bad HW though, but I will order one last original HP power supply for the 820.
It wouldnt surprise me if it would work, but Id really like to know why then.
It also looks like as if the clamp might fit the BIOS chip(s). But I got to read more into it.Leave a comment:
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Elitebooks (820, 840 etc. all gens) and those continuously flashing Power LED + flashing CapsLock LED
[B]As the Elitebooks (820, 840 all gens) only show flashing Power LED and flashing CapsLock (continuously)[/B] + [COLOR=#e74c3c][B]a very soft "ticking" noise near the DC Jack[/B][/COLOR],
I wonder if re-flashing the BIOS might be of any use here.
As far as I understood, steady flashing either means insufficient power or a CPU/GPU/Motherboard issue. I use the original 65watt power supply.
There are so many threads out there, but most of the solutions involve flashing codes, which I dont have or claim that you MUST use the original power supply, do a hard... -
The right BIOS Programmer - The right software (HP Elitebook 820 G1, 840 G2) no soldering, EC, DMI, ME
Greetings badcaps community,
I havent done this for a long time and want to start it all again, after some evil and annyoing illness.
So I apologize in advance, if some phrases might sound a bit like gibberish or illogical to you.
Im trying my best to fully describe what I plan to achieve and hope I was choosing the right sub-forum for my new adventure.
I have a Elitebook 820 G1 and a Elitebook 840 G2 here.
These ask for a password when entering the BIOS, but boot just fine from the internal SSD.
I learned that desoldering... -
Ah, "super capacitor".
Now I found some more things to consider and to read.
[URL]https://www.badcaps.net/forum/general-topics/general-computer-tech-discussion/34467-replace-cmos-battery-with-super-capacitor[/URL]
Thank you!
https://Ah, "super capacitor".<br />...
Thank you! :)Ah, "super capacitor".
Now I found some more thingsLeave a comment:
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Capacitors instead of RTC/CMOS batteries
Hi, would there be somekind of knowledgebase for laptops, that are using capacitors (+laptop battery) instead of RTC/CMOS batteries for keeping BIOS/UEFI values "alive/stored"?
I learned hp and lenovo are doing this on their newer models a lot. I myself have a 2016 ASUS X540L here, that has not RTC/BIOS battery.
Id like to know what to look for on the mainboards.
Thank you in advance. -
Hi!
Would this solution be based on using a SPI Reprogrammer only?
Or is there a chance to flash the BIOS via the Windows award tool and/or using a USB Drive in DOS Mode?Leave a comment:
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