There are a lot of videos repeating the claim about the CH341A programmer requiring fixing but have you seen Sorin's (Electronics Repair School) video about this? He shows that while the data lines measure 5V at idle, it is only a few microamps, and as soon as communication begins it drops to 3.3V so no modification is required. I personally left mine unmodified after watching his video and have had zero issues flashing many BIOS chips.
so i am new to this and i was trying to follow along step by step and didn't realize i needed the 1.8v adapter for my chip. i put the clip on and detected the chip through the 3.3v. i didn't not start to read the chip or anything past that point. would my chip be damaged just from that and how would i test it to be sure?
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.
The voltage issue of the ch341 affects the 3.3v eeproms only with the 1.8v adapter the voltage is correct for the data pins i used mine on both chips without modification but i consider getting another one and mod it, as for the clip i got no issues reading 3.3v bios chip on board i got the same readings using the clip and the bios adapter but for the 1.8v bios chip i got different readings sometimes the chip was not even detected despite checking with the multimeter the bios pins to make sure they're making contact with the bios legs so yes the clip is to be avoided btw the neoprogrammer feels more trustworthy than the other ch341 tools. Nice demonstration
Although you mentioned the pin orientation of pin 1 as upper left. It would have been nice to pinpoint it for novices. Perhaps the orientation of the adapters on board. Otherwise good.
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
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!
@@tobiasgunnarsson1047 when clamp has 2 ways to send signal (chip or mobo circuit).. the chipset circuit draws some of signal away from chip and fails.. desolder it.
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
Thanks commander really best video on TH-cam 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. :)
So let's say I have a bricked MB and reprogram the IC with NeoProgrammer. 1. Is it the normal BIOS Update file I get from the manufacturers website or is it another one? 2. And let's say the chip has a capacity of 128 Megabytes but the BIOS file is much much smaller. Is this a problem or will there inevitably be free space left after flashing? Thank you in advance Sir!
1. Es kommt tatsächlich darauf an um welchen Hersteller es geht. Da gibt es die verschiedensten Varianten, die mal mehr, mal weniger komplex zu adaptieren sind. Die am besten funktionierenden Varianten für mich sind a) sich ein komplettes Image aus den bekannten Quellen wie bspw Badcaps.net zu besorgen oder b) ein Backup von deinem BIOS zu ziehen und dieses durch einen der fähigen Techniker bspw. In den verschiedenen verlinkten Discord-Servern "reparieren" zu lassen. So hat es bisher für mich immer am besten funktioniert (Ich beleuchte in dem Video lediglich den technischen Aspekt). Viele Grüße
@@fairrepair_en Hammer wie schnell Du auf Kommentare antwortest! Find ich super. Bin angehender Informatiker und habe aktuell ein kleines Projekt zu Hause am Laufen und bin im Zuge meiner Recherche über Dein tolles Video gestolpert. HexFlex gehört nun zu meinem Repertoire und ich habe schon einige Spielereien mit Hex-Codes und übriggebliebenen BIOS Chips veranstaltet :D Habe direkt mal ein Abo dagelassen!
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.
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.
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
@@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
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.
Agree
There are a lot of videos repeating the claim about the CH341A programmer requiring fixing but have you seen Sorin's (Electronics Repair School) video about this? He shows that while the data lines measure 5V at idle, it is only a few microamps, and as soon as communication begins it drops to 3.3V so no modification is required. I personally left mine unmodified after watching his video and have had zero issues flashing many BIOS chips.
hay que retirar la Pila Del BIOS antes que eso, No ?
Good luck with your new company. If you maintain the quality you now deliver, you will have enough customers in no time!
Very well explained, good for us beginners
Great video and Good Luck with your business. I hope you do well and to see more videos..😎😎
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.
very good explanation thanks a lot sir
so i am new to this and i was trying to follow along step by step and didn't realize i needed the 1.8v adapter for my chip. i put the clip on and detected the chip through the 3.3v. i didn't not start to read the chip or anything past that point. would my chip be damaged just from that and how would i test it to be sure?
Nice bro,.. very well explanation... Keep it up🤗 more video please😁
Wish you the best with your small business venture and thank you for the informative video.
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
The voltage issue of the ch341 affects the 3.3v eeproms only with the 1.8v adapter the voltage is correct for the data pins i used mine on both chips without modification but i consider getting another one and mod it, as for the clip i got no issues reading 3.3v bios chip on board i got the same readings using the clip and the bios adapter but for the 1.8v bios chip i got different readings sometimes the chip was not even detected despite checking with the multimeter the bios pins to make sure they're making contact with the bios legs so yes the clip is to be avoided btw the neoprogrammer feels more trustworthy than the other ch341 tools. Nice demonstration
Thanks!
Très génial tutoriel je vais l'essayer 😢 merci pour tt
Good luck sir 🎉
Although you mentioned the pin orientation of pin 1 as upper left. It would have been nice to pinpoint it for novices. Perhaps the orientation of the adapters on board. Otherwise good.
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
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!
@@tobiasgunnarsson1047 when clamp has 2 ways to send signal (chip or mobo circuit).. the chipset circuit draws some of signal away from chip and fails.. desolder it.
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
Thanks commander really best video on TH-cam 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. :)
where can we get the bios file to be flashed?
So let's say I have a bricked MB and reprogram the IC with NeoProgrammer.
1. Is it the normal BIOS Update file I get from the manufacturers website or is it another one?
2. And let's say the chip has a capacity of 128 Megabytes but the BIOS file is much much smaller. Is this a problem or will there inevitably be free space left after flashing?
Thank you in advance Sir!
1. Es kommt tatsächlich darauf an um welchen Hersteller es geht. Da gibt es die verschiedensten Varianten, die mal mehr, mal weniger komplex zu adaptieren sind.
Die am besten funktionierenden Varianten für mich sind a) sich ein komplettes Image aus den bekannten Quellen wie bspw Badcaps.net zu besorgen oder b) ein Backup von deinem BIOS zu ziehen und dieses durch einen der fähigen Techniker bspw. In den verschiedenen verlinkten Discord-Servern "reparieren" zu lassen. So hat es bisher für mich immer am besten funktioniert (Ich beleuchte in dem Video lediglich den technischen Aspekt). Viele Grüße
Sehr nettes Video, hättest du es nicht in englisch aufgenommen wäre ich wahrscheinlich nie drüber gestolpert.
Liebe Grüße aus Essen!
Glück für uns beide... :D
@@fairrepair_en Hammer wie schnell Du auf Kommentare antwortest! Find ich super. Bin angehender Informatiker und habe aktuell ein kleines Projekt zu Hause am Laufen und bin im Zuge meiner Recherche über Dein tolles Video gestolpert. HexFlex gehört nun zu meinem Repertoire und ich habe schon einige Spielereien mit Hex-Codes und übriggebliebenen BIOS Chips veranstaltet :D
Habe direkt mal ein Abo dagelassen!
Nice job
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 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.
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
I have ch341a and i want to program plcc32 chips...is this possible with an adapter?
Not sure about that, sorry
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
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
Never apologise for your accent. It's like apologising for your race or culture.
Thank you! :-)
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
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.
The vape rips lol
:D
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
Your wrong
I am always open for critics, corrections, hints and better approaches. :)
Thank You!!
I sent you a friend request on Discord,