HP Prodesk 400 G6 mini admin bios password

[hoaca388]

Hello,
Please, anyone can help me with a 400 G6 Desktop Mini PC? The BIOS got corrupted during updates (5long+2short beeps, EC firmware is invalid)
i'm a newbe in such things.. I read the chip and saved the BIN with CH341A (NeoProgrammer 2.1) and it seems to be corrupted.
Does anyone can fix it?

Serial: 8CC1345315
Part: 1C7A3EA#UUZ

Thanks for the help!

HP ProDesk 400 G6 Desktop Mini PC

[raffa555]

HP ProDesk 400 G6 Desktop Mini PC

WOW! how you do the magic? it's OK now, thank you so much!

[beBoss]

Hello,
Please, anyone can help me with a 400 G6 Desktop Mini PC? The BIOS got corrupted during updates (5long+2short beeps, EC firmware is invalid)
i'm a newbe in such things.. I read the chip and saved the BIN with CH341A (NeoProgrammer 2.1) and it seems to be corrupted.
Does anyone can fix it?

Serial: 8CC1345315
Part: 1C7A3EA#UUZ

Thanks for the help!

Can you tell me how did you manage to read it, I have been struggling for months with two different CH341A - old one that has voltage problem and the new fixed one, different cables, adapters etc and still cannot dumb it, if you can share what type is your chip - mine for example is 16 pins and which exactly, what software aka where to download it most importantly, that would be helpful, thanks!

[raffa555]

Can you tell me how did you manage to read it, I have been struggling for months with two different CH341A - old one that has voltage problem and the new fixed one, different cables, adapters etc and still cannot dumb it, if you can share what type is your chip - mine for example is 16 pins and which exactly, what software aka where to download it most importantly, that would be helpful, thanks!

Hi,
here are the steps that worked for me:
1- CH341A with SOP8 adapter for the 25series chips(bought on amazon) & SOP16 clip (bought on amazon). Check if the jumper on the CH341A is in "programmer mode" (jumper betweeen pin1-2)



2 - Check the pinout of the SOP16 clip with a multimeter to find out the PIN no 1 (set the multimeter in ohm measure or continuity)
3- Connect the SOP16 clip to the SOP8 adapter (i used dupont wires) to the corresponding pin:

8 PIN CH341 programmer -> 16 PIN SOP Testing Clip
1 -> 7 (CS)
2 -> 8 (MISO)
3 -> 9 (WP)
4 -> 10 (VSS)
5 -> 15 (MOSI)
6 -> 16 (SCK)
7 -> 1 (HOLD)
8 -> 2 (VCC)

Connect the SOP8 adapter to the CH341A. The 25 series pins are the 8's closest to the USB connector:



4 - Download from here https://github.com/YTEC-info/CH341A-Softwares/tree/main Neoprogrammer 2.1 (drivers and software)
5- Disconnect the power from the 400G6 PC. Connect the SOP16 clip to the GigaDevice chip on the motherboard (matching PIN no1 of the chip to the PIN no1 SOP16 clip. You can find out the PIN no1 of the chip checking the small cirle on the upper surface on it). I've tried with and without the CMOS battery connected with no difference.
6 - Open Neoprogrammer 2.1, check if the CH341A is selected in the "Hardware" menu. Click "Detect chip" (the button with the "?" icon) . If you got the IC not responding message, check the SOP116 clip positioning. The positioning of the clip is a little bit tricky... you have to try and retry (poistioning-detect clip and repeat)
7 - When Neoprogrammer find out the chip, after you click detect button, a yellow popup message appears with chip info's (GIGADEVICE GD25Q256....)
8 - Erase the CHIP (button with X icon). The led on the 400G6 start blinking 5 red- 7 White
9 - Open the BIN file and click the program button (the one with the blue arrwow icon) with this options: Write - Verify
10 - Disconnect the SOP16 clip

If you got error, try to reset CMOS following the HP procedure (disconnect all the power sources, disconnect the CMOS battery, press the power button multiple times and/or press for 25s the CMOSSW50 button on the motherboard)
If you got error again, try to repeat the erase-write process...

Hope this can help you!! Let me know if you got success

[Joel2B]

hello everyone

thank you very much for the steps raffa555, helped me a lot but unfortunately the tweezers did not work for me,
i buy both versions,the one with all the connections and the 16 to 8, luckily i ordered some mini tweezers as a last resource and it worked, i could extract the bios



can you help me to remove the password?, i bought without asking if had a password, i already tried rcunlocker but tells me "wrong chip"

thank you very much for your time



serial no. 8CC11026R5
product no. 359P8LS#ABM

[hoaca388]

hello everyone

thank you very much for the steps raffa555, helped me a lot but unfortunately the tweezers did not work for me,
i buy both versions,the one with all the connections and the 16 to 8, luckily i ordered some mini tweezers as a last resource and it worked, i could extract the bios



can you help me to remove the password?, i bought without asking if had a password, i already tried rcunlocker but tells me "wrong chip"

thank you very much for your time



serial no. 8CC11026R5
product no. 359P8LS#ABM

HP ProDesk 400 G6 Desktop Mini PC
Serial_8CC11026R5
Sku_359P8LS#ABM
Build Id_20WWQ6CT601#SABM#DABM
Fearture byte_3E3X476J6S6b7B7J7M7Q7T7WaBapaqaubhcAdUdpdqfAfPk8mE.QF

[Joel2B]

HP ProDesk 400 G6 Desktop Mini PC
Serial_8CC11026R5
Sku_359P8LS#ABM
Build Id_20WWQ6CT601#SABM#DABM
Fearture byte_3E3X476J6S6b7B7J7M7Q7T7WaBapaqaubhcAdUdpdqfAfPk8mE.QF

it works!!!
thank you very much hoaca388 , after hours of trying to flash it and with errors, was achieved
I dont know how they do it, but they are the best!!

[inspirim]

Model: Hp Prodesk 400 G6 SFF
Motherboard: L64712 or L49705-001 attach photo
Serial: CZC0177FYQ
ProductNo: 7PG47EA#ABZ attach photo
no power defect, attach bios
thanks to all

[peste]

post merged..

[peste]

Model: Hp Prodesk 400 G6 SFF
Motherboard: L64712 or L49705-001 attach photo
Serial: CZC0177FYQ
ProductNo: 7PG47EA#ABZ attach photo
no power defect, attach bios
thanks to all

post the contents of the bios chip even if it is corrupted..

[inspirim]

corrupted bios

[danito]

corrupted bios

Try

[vpotechnology]

please bios key collaboration hp prodesk 400 g6 mini pc seria 8cc1421h64

[nafienew]

pleas need remove password bios
HP Prodesk 400 G6 Desktop Mini Pc
serial no 8CC2122QWB
DAF91MB16B0 REV B
MODEL : F91

[hoaca388]

pleas need remove password bios
HP Prodesk 400 G6 Desktop Mini Pc
serial no 8CC2122QWB
DAF91MB16B0 REV B
MODEL : F91

RC unlocker