Thanks for answering again, I had already done the transfer of the DMI to the downloaded Lenovo BIOS by looking at the information on how to do it here (as I said before, I informed myself and tried to solve it myself before bothering you, in the same way my idea is to learn and thus not bother you or depend on you, in the same way I want to ask you a couple of questions
I read the same here in a post from a user who had a similar problem, and he said to solve it by deleting the BIOS file header, this would be starting at position 00000000 to 000007F0, and voila it works, my question is...

Hello, good morning. I haven't responded since the last message I sent. I was tasked with repairing my laptop. I'd like to tell you that the BIOS you provided me works, but only halfway. I'll go into the step-by-step instructions.
1st - If it turned on, it only entered the BIOS and got stuck. I'm saying this because I connected another keyboard.
I force-restarted it, and then it turned on fine, but since it was disassembled, I didn't have an HDD to test it. I spent several minutes pressing keys and it did work. So I turned it off. I put in another RAM, a blank SSD that I had saved,...

I apologize for not responding to Mr. Volinakis, but I just finished my work. I'm self-employed. This is why when work comes, you have to do it because you can't be sure that more will come tomorrow or the day after. So, I'll try the BIOS now. Thanks again....

I'll try it right away. Another question: is it necessary to flash the BIOS directly, or can it be flashed with tweezers? All the tests I've done have been performed with tweezers. Could this be my mistake? Thanks again....

Thanks Volinakis, from the file name I assume it's the original BIOS.
Downloaded from Lenovo's website, right? Unless you modified it. If not, I've tried it. The computer turned on, but it didn't show any information, such as the model, etc. Then I installed other ones, and now the laptop only runs with the fan. I haven't found any software, as I have the exact same BIOS chip model as my motherboard. What would you recommend flashing it with? Thanks for responding so quickly. Best regards....

Good morning, gentlemen, I hope you can help me with my laptop, I told you that I saved it about 2 years ago because it wouldn't turn on, now I have a ch341a programmer, I made a backup of the bios, I flashed an original downloaded from lenovo and it started, but it turned off after a few minutes, I entered the bios configuration and the brand, model, serial number, windows serial number, etc. did not appear, I request your help, I did everything I found in the forum but I could not solve it, also now it won't start again, it turns on but the fan does not turn, I will share all the information...

Sir, good morning, thank you for this wonderful page, my name is Max, my username is MximilianDz, I work independently in the computer field, more in mobile phone and computer repair, I studied computer programming, but unfortunately I could never practice that profession although after years it served me a lot as a basis for the "occupation" that I now perform, I am 44 years old today, just as you offer your knowledge and help for free, do not hesitate to ask me anything regarding cell phones, maybe they do not start, they freeze, you reset it and FORGOT your google account or your...