Ths year I bought an HP Chromebook with firmware write protection.
dedede board (Landrid)
In the photo attached you can see the holes.
Can you help me how to correctly jump the holes to correctly remove Write Protect?
Thank you so much in advance
connect the upper/lower holes on the right using a paperclip or solder
dear, I’ve tried but the trick doesn’t work 
Are you sure the jumper you are using is making a connection on both holes?
Looks like Landrid came out mid 2023, so maybe this is the issue:
https://www.chromium.org/chromium-os/developer-library/guides/device/ro-firmware-unlock/
no, it’s not. JSL / DEDEDE based devices do not use the Ti50 / do not have the verified RO feature. And even if they did, it wouldn’t prevent the OP from disabling WP and flashing, only booting after the fact.
it’s not a trick, and “it doesn’t work” isn’t something we can help with.
Dear, thank you for your reply. Excuse me but I don’t have understood what the OP stands for…
RO = read only
WP = write protect
OP = ???
OP = original poster (or original post) aka you
Hi, I’ve been looking everywhere for this information. Thank you.
I consider myself fairly diligent but have only found you to be reliable on information for this particular model without a wp screw or s/w solve. I was given this HP 10e as a gift and very quickly found in its default {OS} state to be as useful as an ashtray on a motorbike. I just have 2 fairly obvious (apologies) questions:
- Can I confirm with you that if we are looking at the 4 pins from top to bottom, left to right, you are saying that I bridge C+D?
- I’m assuming I make this a permanent bridge i.e. solder and isolate?
I do understand it may seem folly to ask for confirmation but one avenue I do advise anyone steer clear from is taking a photo, uploading it to ChatGPT and following its advice which was to “definitely” bridge from bottom left to top right.
Thankfully HP didn’t ask questions and returned a repaired Chromebook in record time.
Once again, many thanks for your help.
Kind regards,
Tony
P.S. I fully agree, why dont people read what you have written previously?
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yes.
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it doesn’t have to be - just needs to be disabled at boot for the script to disable software WP, after that it’s irrelevant unless you re-enable software WP
After reading Anwhelan’s post, I decided to disassemble my Chromebook with the Landrid board and try to rerun the firmware utility script. No luck. The WP message continues to remain red, and this is after short-circuiting as per your instructions, both running the PC with the battery DISCONNECTED and with the battery CONNECTED.
Out of curiosity, I measured, with a multimeter, the electrical resistance (in non-short-circuit conditions, that is, not-modified virgin circuit) between points A, B, C, D, and the long copper strip located at the bottom (which I will refer to as letter E).
Results of the resistance readings:
Resistance between one point and strip E:
A/E resistance off scale
B/E 0 ohm
C/E resistance off scale
D/E 99.3 kiloohm
Resistance between two points:
A/C 32.86 kiloohm
B/D 99.2 kiloohm
A/D resistance off scale
B/C 0 ohm
A/B resistance off scale
C/D resistance off scale
I don’t know if this data can be useful or completely useless, but I decided to share it anyway. OBVIOUSLY, the piece of metal with which I then performed the short circuit (2 different tests, aluminum foil and a metal wire) has a resistance of zero ohms.
Hi,
Depending on @MrChromebox 's reply will dictate my further response here:
Good Morning Mr. C,
Due to the change in weather, this Chromebook has now moved into the completely useless category. With it being colder these days, I no longer need to wedge my living room door open.
All brevity aside, you did raise a good point somewhere in your writings therefore I must ask regarding this particular model, am I trying to shove a square peg into a round hole here? You’ve given what I see as a critical piece of advice elsewhere that sometimes its just not worth the bother. Is that the case here?
If not, I will zap and flash…so to speak. And with that I will document carefully for our friend @mpatrick1985 if he hasn’t moved further yet. By the way to help, if you look at “hole” TR, you can see its clearly not isolated hence the black circle around the others. Look even closer you will see its touching the track at the bottom too.
If you advise it is worth it then I will whip off the back and do the business.
And I fully understand that I hold harmless any advice given and accept full responsibility if I change my now useless doorstop into a …well…another useless doorstop and I shall await warmer times.
Thanks in advance.
I don’t have this board or the schematics for it, all I have is what others have reported working. AFAIK the correct way to disable WP on LANDRID is by connecting the two jumper holes on the right side.
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Hi,
Yes you are correct. Also I had a darn old job finding schematics for this. No my question was you had mentioned somewhere that some of these chromebooks are just not worth the effort and I was wondering if this model falls into that category?
So, I did a mini mexican wave, people walking past gave strange looks. Nothing new there then.
I disabled WP successfully but not as straight forward as one is led to believe. I have documented the process. Once I edit the pics, I’ll post here.
Now a flavour of linux. Exactly why I have a 128gig micro ssd. I’ll see which one I like best from my multi boot’s but suggestions are warmly welcomed.
Thank you for your help in this. Like I said, I had scoured everywhere and was so happy to find your posts.