matt I have been experiencing a problem similar to the one you describe, so before buying another power supply I asked for an 8gb ram in amazon to test since my pc only has one it may be that it is bad And according to what he explains to me, your problem was that I bought a ram, I do not know if they will be good, it is only to test if the problem is solved

Hello, after following the procedure and installing the Rom, a different processor appears.
( Ryzen 5 3550u) . I have an MN35

Hi, Matt, i have flashed the bios mod in my machine (a Chatreey MN1) that have a HCAR357-MI with a Ryzen 3550H to enable TPM, but something went wrong: the BIOS flashed ok, but when i restart the machine, i only get a black screen and can't access to the BIOS or boot. The fan spins a bit and then stops. Whay can i do? I have backed up the original BIOS. Is there a way to reflash the BIOS?

Can anybody help me?

Thanks!!

P.D: To clear the CMOS do i have to change the position of the jumper or i have to remove it?

hello chucky , first time after reflash can happen , you have to reset the cmos by changing jumper position, wait a few minutes then change it back and power on .

if nothing happens i would try a more determined approach : unplug the battery connector, wait 10 minutes just to be sure , then power on without the battery connected;
after several seconds it should come back to life , you may see leyboard led , fan patterns changing etc , before the screen comes back to life.

changing subject: i personally don't know any confortable way for the end user to reflash the original bios without the pc booting , i'm afraid...

Have you compared the two Bios before flashing (firmware ID / GUID above all ) ?

@Moreno : mine is telling the same 3550H code as before , it can't physically change ;
which tool are you using to assess the cpu model? Have you seen it in windows summary ? i'd try HWiNFO64

@Matt i haven't checked the firmware ID/ GUID. Which tool are you using for that?
I have backed up my BIOS before flashing. Here are the two files: The original BIOS (AMIBOOT) and the BIOS mod (AF5PN01) flashed. Can you check them? What are the details you need to check?

I have uplugged the battery and changed the jumper position, but nothing happens. I will try to power on without the battery and wait several seconds.

I have ordered in Amazon a ch341 programmer with a clip (KeeYees SOP8 SOIC8 Clip de Prueba para EEPROM 25CXX / 24CXX + CH341A USB Programador Flash BIOS EEPROM 24 25 Serie)
to try to restore the original BIOS if everything fails. Can you help me with this if this is the only option?

Thx.

i'm very sad you haven't resolved your issue yet.

the GUID can be checked with the amiflash utility you propably used (AFUWINGUIx64) , i have checked and they match with my current bios (AF5PN01_mod) so you shouldn't experience this serious issue .
Firmware IDs can have little differences instead as far as i know

Are you sure you have checked "program all blocks" (main, Boot Block, NVRAM) ?

i've done a compare(via compare plugin installed on notepad++) between generated reports by MMTool 5.02_patched and i see substantial differences between ROMS ,
the most important boot block relocated from 6th to 7th FV;

it is vital to do a complete flash when there are such differences to ensure a coherent BIOS as result in the rom .

However the boot block has the same starting address & lenght between the two ROMs ,
maybe it is dynamically referenced somewhere inside the ROM by FV and not by address?
I don't have this kind of knowledge, i'm not an embedded programmer, i'm a java one .

Other than that i really can't explain the reason why you're experiencing such an issue.

I don't have any relevant experience with EEPROM Programmers , so be sure to obtain the correct procedure from the equipment vendor or asking in the forum by opening a separate support thread looking for this specific support,however i will try to help you the best i can .

You will find in the attachments the compare made and the reports generated

Zitat von Matt85R22 im Beitrag #22

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Are you sure you have checked "program all blocks" (main, Boot Block, NVRAM) ?

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Zitat von Matt85R22 im Beitrag #22

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i\'ve done a compare(via compare plugin installed on notepad++) between generated reports by MMTool 5.02_patched and i see substantial differences between ROMS ,
the most important boot block relocated from 6th to 7th FV;

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my original MN35 ROM has the boot block as the 7th the same as you , so i flashed the whole rom otherwise i could end up with wrong address references mixed from these two roms resulting in a unusable BIOS.

The boot block in my opinion is the most important difference but there are many others that can be seen comparing reports.

in post #11 [REQUEST]: Enabling FTPM support on a 'Generic' AMD NUC-alike (HC HCAR357-MI) there's a summary for Melvin, in which i suggested him all the steps, can be useful as a reference.

I have compared the reports from your BIOS update process and my BIOS update process, and i think maybe the problem is the boot block you have commented: in your process the boot block doesn't change (is the 7th in both BIOS) and in my process it changes from 6th (original BIOS) to 7th (your BIOS modded). Is there a way to change its position in a BIOS without corrupting it? In your BIOS update the boot block doesn't change, but blocks 01, 02, 03, 04, 05, 06, 08 yes. What can change and what it can't change?

Thx

i havent' commented or modified anything by hand (too risky) , i've only modified the bios updating drivers inside it (OROM) with ubu; the original AF5PN01 bios is made by MINIS for their dmaf5 based on the same HC HCAR357-MI
i'm not an embedded EEPROM programmer so can't say for sure what can be changed and what not , as stated above i think the problem may be your bios is looking for a boot block that isn't there because it is relocated in the new rom.
it is likely that you have a mix in your rom but it is only speculation.
Best way to have more propability for your model to have a working rom using AF5PN01 is tho program ALL blocks , but can't be 100% sure (as stated in #11)
anyway you have to restore your original bios before doing anything else

Hi Matt, i have successfully restored the original BIOS with the CH341a programmer. I wonder if there is a way to modify my original BIOS with the AF5PN01 bios made by MINIS to add their mods. Comparing the 2 original BIOS (my BIOS and the HCAR357-MI) there are some differences, like having 1 more FV than mine, Boot Block located at different FV, and some differences in Nested FVs. What do you think?

Thx

Hi Matt. I really appreciate the work and effort you have put in here. I thought there was no solution to this. You buy a new, modern piece of equipment, and you can't take advantage of essential functionality because the vendor doesn't provide a firmware update. And I've tried a thousand ways, but Tbao in this case won't agree to provide it. I have to say that in my case I followed the instructions on this forum with the flash application and the ROM with the updated drivers, and everything went smoothly. I even like the minisforum logo better.

@Chuky i'm relieved you had succesfully restored your original bios , if i were you i'd not touch anything by hand ;
IMHO the only thing you can try , if you are determined is to use the AFUWINGUIx64 with the exact settings in my post #22 flashing the rom you flashed earlier one more time ;
this way you will be sure you have programmed all blocks , including boot block that hopefully will be correctly relocated in a coherent FV .

If it fails you can restore you original bios one more time ( was it difficult ? can you explain the basic steps you have done? did you place the clip over EEPROM without moving it? )

I don't have the skillset to understand the work done by MINIS engineering , also because we are looking at a compiled rom file , not the source that generated it , so extra effort is needed ;

@Raycastle thank you! i worked on other users ' observations and took a small risk , because i really find TPM very useful to protect data inside this mini pc, not even installed W11 ;
it is a pity that Tbao isn't supporting further developments , but that's a common thing among less known chinese brands,
they maximize profit having aggressive prices and that market model can't support further development once the product hit the market .

Matt, for the moment i'll wait sometime to make another try. The process wasn't difficult: i have followed the guide from [GUIDE] Flash BIOS with CH341A programmer and it works, not at first try, but after three of four yes (the most difficult part is assembly all the conections right: the clip to the adapter, and the adapter to the programmer).

I have used the clip over the BIOS without removing it. It's a Winbond W25Q64FWIQ chip, so i need to use the 1.8V adapter too. I have used CH341A programm v1.30 and removed power and battery from the motherboard.