How to reprogram a BIOS flash IC properly with CH341A - The Dos and the Don'ts - Basics #1
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- Опубликовано: 4 июл 2023
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One of the best explanatory videos on this topic I have ever seen !
I wish I came here b4 I programme my bios using clamp. Now my Laptop is not booting only flash frm charger port.
Very well explained, good for us beginners
Wish you the best with your small business venture and thank you for the informative video.
Nice bro,.. very well explanation... Keep it up🤗 more video please😁
Great video and Good Luck with your business. I hope you do well and to see more videos..😎😎
Good luck with your new company. If you maintain the quality you now deliver, you will have enough customers in no time!
Très génial tutoriel je vais l'essayer 😢 merci pour tt
Nice job
Good luck sir 🎉
Good video!
keep in mind to measure the ch341a pin 4 and 8 volt first before "fixing" as some dont have 5volt problem depending on pcb factory.
Good hint. Thanks.
Hi Mike great video. If you got time can you make tuturial how NVDC Circuit works and how you much aproach it to fix it. I woul realy apreciate it.
Thank you
Regards
Steve from Belgium
I think Sorin in one of his videos used clamps on chip on circuit and broke 1 leg from bios chip
im using the clip, but not onboard, just to use clip if that sop8 adapter is not avialable... and the software i used is flashrom which i think its more convenient
Thanks commander really best video on RUclips about programming. However how much air flow and temperature u used ?
Another from my experience I saw that xmc chips has problems with ch341a not always can be success programmed maybe I'm doing something wrong......
I had no issues with XMC ICs so far, so can't tell much about this topic.
Also, there is no point to share with what temps and air-flow i work if you don't use the same station with the same tips. Personally i like it warm, 450 degrees with 15% Air. :)
A simpler 3.3v mod is to cut the 5V trace on the back, and then bridge / jumper the 3.3V and 5V header pins beside the ZIF socket. Then bridge the 3.3v pin on the regulator to capacitor C4, which connects directly to pin 9. No wires or lifted pins required.
i actually did the 3.3v mod..all i got was able to read ic`s but not write into them...software lock up and thats it...put back the 5v original configuration and worked normal
@@theodordan680 Interesting. I've also seen another electronics repair youtuber showing that it's only 5v when there's an open circuit, and it drops to ~3.3v when you connect it to a chip. so it seems the mod is really not necessary at all.
@@taylorsharp5928exactly
Great video . The clamp is crap. There is no voltage problem according to Sorin.
That's not true! The only conclusion Sorin managed to show in his video was, that there is no CURRENT problem. The Voltage problem do exist and Sorin did show it clearly in that video.
Thanks bro. I think i damaged or corrapted my bios sindbthe PC is nolonger booting. I flashed using clamp.
I have ch341a and i want to program plcc32 chips...is this possible with an adapter?
Not sure about that, sorry
can i do this on,,,, MSI b550m pro vdh wifi....
Sure, there should be a SPI flash present too, as in almost any other laptop or PC motherboard
Hi there, Continuity means correspondence? thankyou
Continuity = direct connection
regards
thankyou@@fairrepair_en
please tell me what is meaning of Diode Mode ? please describe with simple words about Diode Mode? thankyou@@fairrepair_en
I don't know so much about electronics but Sorin made a video about this voltage mod and he said mod is unnecessary. Because that voltage doesn't burn chip with low amps.
Well, different technicians with different opinions, but you have to decide whether you want to stay safe or not. I have also learnt much from Sorin, he is a great technician. However, he has not eaten wisdom with a spoon and he is known for doing slightly dangerous things to accelerate the repair attempt. Good for him if it works out, but bad for a beginner who is not able to differentiate. Best regards
@@fairrepair_en Don't be jealous, just watch Sorin's video, he is right on the money and anyone who bothered to hook it up and do a simple voltage test would have seen the voltage auto adjust. The mods were done out of ignorance not wisdom. In this case he ate wisdom with a golden spoon.
@@gseperd9177please what? Auto adjustment of voltage using a non adjustable constant voltage regulator? 😂 Some people have to start to think, before they post...
What Sorin said on his video is partially correct (the part with the low current there he got correct) and i do have a lot of respect of him. But the part with the voltage he got completely wrong! His opinion conflicts with the basic physics of semiconductors and may (and will sooner or later) lead to a permanent damage of data or the rom containing chip itself. Can it be replaced easily? Yes! Can the lost data be recovered? Hell no, not in that rare case! Do you want to be responsible for a loss of maybe very important data that may ruin your career? Maybe, i am not you to tell that.
Sorin is living in the UK, but there are other contries in this world with much more strict regulations and even law enforcement in such cases. One wrong step and bye bye your commercial licence forever.
What you may believe out of lacking knowledge, is your own problem. It is not possible, to change the physics of the world, we are living in, so it fits yours or someone elses liking. Period set in stone.
@@fairrepair_enVery wise and 100% correct choosen words.
If the BIOs have an issue why to reprogram it? We could update or not? Or do we get the same result at the end?
If the BIOS is corrupt, there will be no way to update it. Some manufacturer like HP have implemented a recovery solution, but it doesn't work always.
@@fairrepair_en Thx for the fast reply. Would it work if we reprogram the corrupt data from the bios? Or what should we do if the bios is corrupt?
@@saeedoubari2430 there are communities with many members who have dumped their known good BIOS firmware. These files can be used for testing purpose. The "BIOS Pro's" can extract the DMI, like serial number, Windows license, etc from the corrupt file and Transplantation it into these known good files, then finally a so called "Clean ME" and the BIOS firmware should be succesfully restored. For Details you need to talk to someone else though. I am more the "Hardware guy" and I am still asking my "Pro" when in trouble... :-)
Regards
Thanks for sharing 🙏 Can I get bios ic 4256BWP password through this device. Pls suggest ..
If the Password inside of the flash and you are able to identify the section, sure. For this dedicated device I can't tell for sure unfortunately.
I had a torture with a clamp for 2 days, could not get it to stick and then i made a lucky contact but reading was inconsistent, it could not erase chip, then could not verify, etc. etc, assorted errors; now i found this video that confirmed that clamp is a pain; some soldering skills and i could take the bios out of motherboard, and use the 200 mil SOP8 adapter on the CH341A programmer; i will post edit after my experiment;
23:54
I also have problem with inconsistent reads ans not being able to upload a baclup of the bios. Am using the clamp.
Can we assume the main problem is the clamp and bad connection to the bios? So I shoud either fiddle around with the clamp or desolder the bios? Or is the problem maybe something else?
Thankful for your vid!
Please can you explain and show us in a second video, how you program the Windows key and serial number in a bios file. It would be great!
Sorry, but i can't. :)
if you followed attentive then you should have noticed, i am far away from being a "BIOS PRO". I'm just teaching the basics here on what exactly you have to pay attention if you was able to source a good dump and want to save your original dump properly.
Regards
Those informations are located inside of a DMI block of your BIOS dump and can be found plain ascii text using a hex editor.
And no, i am not going to teach you, how to do that! There are tons of informations about the structure of DMI on the internet
Throw a clamp into the garbage first day i got the package
you can use it for WSON8 chips desoldered and straight on clip if you dont have wson8 pcb adapter.
Are you a German national?
Yes
Never apologise for your accent. It's like apologising for your race or culture.
Thank you! :-)
Your wrong
I am always open for critics, corrections, hints and better approaches. :)
Thank You!!
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