Samsung 350v No POST, Modding BIOS files - LFC
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- Опубликовано: 30 июл 2024
- This Samsung 350v doesn't POST. We're doing BIOS work again today, but this time I'm gonna git gud
and import serials from the old BIOS.
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Chapters:
00:00 - Intro
1:10 - Assessment
3:00 - Swapping RAM modules & RTC Reset
8:30 - Disassembly & Inspection
12:30 - RTC Battery removal & BIOS chip locations
22:30 - Dumping the Main BIOS & flashing an untrusted one
30:50 - CPU Inspection & Flashing the Second BIOS
33:30 - Problems with using an untrusted BIOS
37:25 - Preparing and opening the BIOS dumps
41:45 - Copying data between old and new dumps
49:35 - Preparing the rebuilt image for flashing
53:50 - Reassembly & Last checks 
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This guy is a proffesor 😂😂
He talks step by step and answers your question without him knowing.
You would even realized you finished the whole video listening to him talking 👍
I am a primary school teacher in the mornings (28 years of activity, I have 2 more to go). I also studied electronics and it is a satisfaction for me to be a "student" of young Graham on this channel. All the best.
Today I leant DDR3L is low power, I thought the L stood for laptop. 😳
I really like how you acknowledge your subscribers and Discord members who contribute to your knowledge. They certainly know stuff that I didn’t know I didn’t know. I've complimented your approach and how addictive this channel is a couple of times, but you also have amazing subscribers. In the comments there’s a wealth of information and very little ego. They are people who seem to genuinely want to share information.
Low voltage, yes. Compatibility between slots/board and the memory cards can be either direction, both ways, or neither, but without knowing ahead of time, just uses what's spec'd.
Your skill and your talent are indeed impressive. But your abilities to teach and communicate are truly phenomenal. A rare privilege to find such instruction this side of a pay wall.
Congratulations on your efforts - you and Louis Rossman are real technicians - not some fake fool like Carey Hozerman who is essentially a card swapper who could never operate at the level of competence you show! Bravo!
Hozerman is way too obnoxious and condescending, thinks he's "all-that"!
You always leave me freaking out with each of your videos, you are the only one who is able to teach me something useful, and also things that I did not expect at all.
There is nothing in the world but 2 things, which makes a man change his rigid face for a smile: one is when working in a dead laptop and suddenly shows BIOS screen; and the other one is from the watchmaker when mounts the watch and the scapement wheel begins to move regularly. Both are ways to "put in life again" a machine. That's your face in today's video!. It is always a pleasure to see something like this. Congrats, Graham!.
Amazing stuff - well above my head but great to watch how you work
Excellent video, I like the direction you are going in your repairs. Thank You...
Dear sir,i thouraghally enjoyed this video,
I really liked,your genuine warmf to the audience,your cracking sence of humor,.the genuine sence of angst and then releif,and also your genuines about agnoleging other peoples knowledge.superb work sir,please keep up the superb vids,thanku steve from the uk.
Great job, this is a nice high level overview of BIOS manipulation. Gives us all a starting point if we ever need to do something like this.
been watching your vids for last few months as recently found you with have a few system with dead bios not really messed with them yet but im finding all your video interesting and informative and also that it not always the end with any system or laptop if bios is corrupted/dead thank man keep up the good work
Ultimate tutorial about flashing BIOS file and editing it with the old ones, which is precious. You just shared it with us free of charge. Hats off. Now have a little deep understanding of the importance of BIOS.
That was good stuff. I know this data is stored in the PC BIOS but now know a lot more about its location.
I really like that when you don't know something your not afraid to say so. A lot of youtubers try to act like they know everything.
Thank you for showing the proper way to keep the BIOS special configuration things!
There is still a lot of questions I have, things I may have missed or forgotten. So I like the way you do this
I just had to leave a comment. you are doing a great job mahn. teaching everyone here. appreciate it a lot
That was very instructive. The BIOS modding part was interesting, I loved it ! I used to flash BIOS via a ch341 (old version, the new 1.7 version is on his way, thanks to your previous video), I already known the procedure to get the windows product key (it's pretty standard, address 006CD00 in any single bios bin file via an hex editor) but I didn't paid attention to MAC address or s/n. That's a new path for me to explore.
Always learning something going down these rabbit holes. It helps when the user tells the truth about liquid and accidental damage
Yea, in this case it didn't matter. Likely that liquid damage is really old. But too often I've wasted time on testing RAM modules when I'd have gone right to mobo repair if I knew there was liquid damage to find.
Great content, love the information given, keep up the good work.
Brilliant vid. I have built my own PC`s and I guess like most of your viewers I have a nerdish interest in how they actually work albeit at at superficial level. I too will never do any of this stuff but I find it interesting and you have a very watchable style.
Top content as usual,good job!
besides the troubleshoot and repair, the way you teach codes and what everything else does as well is very helpful!
And I thought I knew about computer building and repairing. I know s***t! This is just a next level. You sir have "passed the game".
Exactly!
I'm used to finding a bad fuse or resistor or chip and just replacing. Never thought the BIOS would go bad (corrupted) and cause the laptop to not start! I usually just check things with a multimeter, and go from there. 🤷♂️🤷♂️🤦🤦
Excellent video just learned something new! Keep up the good work.
This one will enter the history man, great job 👍🏻👍🏻💐
Hi Adam, great video, very informative and learnt a lot. Thanks
How on earth do you store so much knowledge, skill and experience in your head?
wow dude.
This is well above my knowledge base 🤯🤯🤯 but is amazing to watch and interesting to pick up some understanding just some of the behind the scenes mastery of the often abused pc
Great video!
I am learning so much.
Congratulations! Handled masterfully.😊
Wow my head hurts but in a good way and I have learnt allot. Thanks for an other great video. I use flux for both soldering and de-soldering just because that's just the way I have always done it. Keep up the great work
Great video, good job. I have learnt a lot myself. Waiting for more videos with bios files and ME region stuff.
Thx so much ! You are really a good coach to understand things that mess up on devices !!!!
very well deep effort for making this video thanks graham
This was SO informative! Thank you so much dude!
Awesome video, really enjoyed watching this.
Good information, Adam! Thank you!
Hello Graham, great seeing you over on PLD's stream
Love it, great information and entertaining too thanks
great work i loved the bios fix.
Excellent video,,you added alot on bios cases ...Great Job
BIOS works are one of my favorite works, have also often shown in videos. I am often asked to make a video about BIOS repair, but it is not feasible to make such a video that could generally show how to repair BIOS firmware. It is only practical examples that can be shared and with new generations come new problems and knowledge. There are also differences between Intel and AMD (AMD has eg. no Intel ME) With experience it gets easier and easier, you understand the logic behind it, but handing over the whole thing would be extremely difficult. Practice makes the master :)
@SiE-Tech Notebook Reparatur, I think I will drop an email to you tomorrow. I would like to get my ASUS laptop repaired. It has the same issue after a failed windows update that also brought with it a bios update. That bricked my laptop in a single day.
Agreed. It seems that if one new how to write a BIOS and could decode the "program" in the BIOS, one might be able to discover all those things.
Yeah, this is a hard one to teach because as you said there is so much variation between devices, I had to do a similar thing with my asus motherboard and had to extract the serial, mac address etc from my dump and bring together the Intel ME, Gbe and capsule file to produce a custom bios using both UEFItool and FD44editor to achieve it.
I think the thing to drive home is that there is an excellent community of help out there, we have the discord servers, badcaps forums to name but a few and of course google.
Really enjoyed this, this is going in my pc repair playlist to refer to later.
good job...Congrats...and thanks for this fully detailed walkthrough!...again...Respect!
YOU ARE BRILLIANT MATE. Thank you for sharing, I have not doubt you have helped a lot of people, including myself. A lot of good karma coming your way for your services to the people. Thank you!!!!!
Great video! I've been a server/storage/network guy forever, but recently got "backup desktop support" added to my duties. While I shouldn't need to get this deep into repair, knowledge this definitely will come in handy. You are very skilled! Very well explained, and I enjoy your dry sense of humor! 😂 Thank you!
Cheers, if nothing else, I think there's a lot of value in people just knowing that these methods exist.
i`m in a similar roll but i just hate trashing motherboards over what might be a 1.40 in parts and a little know how.
ME Region is within the main bios and it only on Intel platforms logic board/cpu. The 2nd bios is EC or Recovery. Some business edition laptop such as Fugitsu has 2 bios ic, main (8mb) and ec (1mb). Some boards EC bios is within ENE, ITE controller, which requires programming via keyboard connector. As always a great video 👍. Take care 🙂.
Thanks for that ! All best from Croatia.
Very interesting. I didn't know a fair amount of this. And I'm really smart! Cheers.
Graphic Card.. add heat to loosen, then replace it.. I have heard doing so helps.. Please do not give up!
This is one of the reasons, I watch you work.. You got this Graham.
great video Graham
Great video! incredibly informative!
Love it. The second half.
Amazing video and you are amazing guy how spread knowledge thank you very much for your hard work 💪
I always flux for removal too, yes. Not as much usually. It does help a bit with initial heat transfer, but at melting temps it doesn't. But it does allow better contact from iron to solder for primary heat transfer, which makes a huge difference.
Nice one
Adamant IT.
Excelentemente explicado y entendido, muchas gracias!!!
excellent video, well explained. thx for sharing
Very educational video. Thanks for sharing 🙂
A tip I have when doing BIOS "rework" is to leave the original chip as is and always have some new, blank chips on hand and mess with THOSE instead. That way, you're sure it's not the chip itself that's faulty by having some bad blocks or other sh!t like that - highly unlikely, but still. As long as there's that 0.01% chance that there IS something wrong with it, you've covered that possibility too.
EDIT: I think the KBC in this case is the ENE chip itself. You can tell if you see the traces from the keyboard connector going to it and I know I also read somewhere that it IS possible through some freak adapters and procedures to actually flash this ENE through the goddamn keyboard flex connector :)))
This kind of video is so interesting, i can't stop looking, even if i have work to do :D
Very informative video. Great work.
love your vids, i micro solder for a living. i do shout flux at the screen an awful lot though haha. the chips will seat so much easier id you did, i really do promise. great vids though keep up the top work. just subscribed
Fab work Graham 👍🏽👍🏽👍🏽
Gran trabajo , todavuia no habia visto un video asi, muy muy muy interesante, gracias.
Very cool. Superb teaching skills.
Excellent video thanks!
Learned more from this video than i did from 3 semesters of a private university :( Thanks Dude!
Will be nice i need to learn this also to transfer the bios codes. A video will helps me allot. Great video!
32:48 Eureka! You can't beat that feeling. 🥳😁
Dropping quality info. Thanks.
nice work, very nice explanation
Very useful information. Thanks
Nice info, thank you for sharing it :)
Great work 👌
🎈🎈YES YES YES, IT'S ALIVE🎈🎈
I HAD FAITH IN YOU GRAHAM.
Excellent video, Graham. One minor quibble at 43:43, when you blurred out the Windows license key, but you did not blur out the Hex values of that key. Not a problem, though, since I am sure it is just a generic license key anyway.
yes! you could just twist the endianess out of that hex ag aquore the key, but as you said its not of a big deal
This video was incredibly useful. I had a Lenovo Yoga S1 (LA-341P Rev 1.O mb) which only started fan briefly and blinked keyboard background LED. I'd removed BIOS chips and read them and compared to ones I had downloaded. Based on your comments it looked like the downloaded ones hadn't been initialized. Decided to reprogram using a CH-341A programmer. Used Neoprogrammer software since AsProgrammer version wouldn't program reliably. So programmed and soldered the two BIOS chips U8, U2202 and bingo started up . Had wondered about the KB9012 Super IO being bad but was the BIOS. Also everything seem fine so maybe other info like serial number etc is stored somewhere else on this machine. It is from 2013. Thanks!
very interesting, very educational, thanks for sharing
this is a great video thanks man
Best explanation!
Excellent video, very beneficial, very good teaching style, all steps explained in easy to understand manner, learnt so much, please make a video on cleaning ME Region
I've just subscribed. Awesome tutorial. Glad you succeeded. If I may, I would love to see you creating a coreboot image in the same fashion. There isn't a single tutorial on the matter and I would love to learn more.
Absolutely!
But sometimes EC firmware mismatch may play a bad joke, till you sync it with the BIOS version.
Great job!
One thing you should also point out is security. A random bios file from the internet could very well contain malicious code or some kind of rootkit. It's not very likely but you never know.
what malicious activity it can cause??
Definitely a possibility. Tho it's hard to imagine that being a productive use of someone's time. Especially someone with that degree of technical skill and knowledge. Still can't be ruled out. Ur right it should at least be mentioned.
it's possible. Is it a likely occurrence or even a likely vector? no. The technical skill to build an effective rootkit that can live in 4MB or even 6MB that can interface in the way it needs to without disturbing/breaking the original functionality is a tough ask, not impossible, but nor easy. Also you have to consider that there isn't a whole lot of incentive to use something that specifically targeting and sophisticated on public forums. People making bios level hacks are doing to to target a government issued model for international espionage, not to steal grammy's recipes.
There have been UEFI rootkits discovered in the wild, such as CosmicStrand.
46:33 Git uses a very clever algorithm to help you to identify a not working commit called „bisect“. You could apply them here too. You divide the modules in an upper and lower half. Change the lower half with the new modules. Does it work? Issue was in the lower half. Does it not work? Issue is in the upper half. And then you repeat that cycle.
This is one of the best episodes yet on restoring the BIOS and retaining the original parameters from the corrupt BIOS. I hope you can show us more on where the Ethernet MAC address can be found and transferred to the new BIOS once you have mastered the UFEI Tool.
Really knowledgeable video sir.
Love from India 🇮🇳 ♥ 🙏
Thank you. 😊
Pls make more videos about bios.
The 'KBC' file is for the superIO chip (the ene chip) its actually a full microcontroller with its own flash on board based on an 8051, you can program it with a standard ch341a by soldering a few wires to the keyboard connector it is the keyboard layout but is also the complete firmware that controls all the ancillaries such as the power button, LEDs and fans.
After watching your videos, I purchased an RT809H with adapters.
SuperIO actually specifically (at least nowdays) refers to a chip providing serial and parallel IO. I know in past times they generally handled more or the chip that does handle parallel and serial handled other stuff on older boards. Never realized this until my new motherboard which is a pro board and has a specific superio chip specifically for parallel and serial IO. Which is fkn nice to have on a modern pc for sure.
This is timely information for me as I was wondering how one would go about transferring Bios System Information from one machine to another. Recently had my Computer Tech guy change out the motherboard on my desktop because it also would POST. I have to wonder if this was the same problem. I've never worked on a motherboard before so I was leary about messing something so I let him do it. New motherboard shows as a HP P6, but my old motherboard was for an S5-1310t. Thank you for producing this informative video.😀
Great work. Thx
Fascinating!…. Thanks
Great great video, thanks
When first I read the title, I thought the power supply was outputting 350v. No Post would be no surprise.
WOW! Great video, this is how youtube should be!
Followed you for sometime now
And 3 days ago I had no backlight in my Samsung laptop up until today , I short circut the resets and backlight restored