DELL Latitude 7430 bios

[robbine75]

UNLOCK

I am not lucky to get it work. I used CH341A to dump the original bios, but can not write bios. The error message: chip main memory with the contents are in disagreement. Then I bought a new program tool RT809F, the bios can be write without any error. After installed the chip, my computer doesn't show any response when press power button. I thought it maybe a bad bios file, then I flashed the original bios, the computer still no response to press power button. Is the computer bricked? What's possible reasons cause this problem? is there any solution I can try to get it work. Thanks.

[Markus1741]

Hello, sorry but your original BIOS file is damaged.
Unfortunately, this happens again and again with these CH341A programmers.
The RT809F programmer is much better, especially since it also comes with good software from the manufacturer.
I use the RT809H myself and am very happy with it.
Try this version built from version 1.23.0 from Dell
There's nothing like a good backup of the original BIOS and a clean programming of the file.
Good luck

[Markus1741]

On the left in the picture is your damaged file, on the right is an intact file

[robbine75]

Hello, sorry but your original BIOS file is damaged.
Unfortunately, this happens again and again with these CH341A programmers.
The RT809F programmer is much better, especially since it also comes with good software from the manufacturer.
I use the RT809H myself and am very happy with it.
Try this version built from version 1.23.0 from Dell
There's nothing like a good backup of the original BIOS and a clean programming of the file.
Good luck

Thank you very much for the help. I flashed the bios you provided, but still doesn't work. before I hold ctrl+esc and then plug in power source, the power button will light up. now it looks the computer was not responsive to any button pressing. I think if the bios is bad, ctrl+esc method should trigger the bios recovery process and light up the power button light, right? I measured the bios vcc is only about 1.4v, I am not sure if this is normal voltage as I think the vcc should be 3.3v, right? is it possible the MB or keyboard is damaged?

[Markus1741]

Hello, at 1.4 volts the BIOS doesn't even start; it needs 3.3 volts.
I also bought a used motherboard on Ebay (Lenovo T490s) and then noticed that a diode over D2101 was missing and only 1.5 volts came to pin 8.
In this case I replaced the diode and then it worked again.
It would also be helpful to have a picture of the soldered chip.
Upload a picture of your chip once.
I don't know how advanced their equipment and skills are for such repairs.

[robbine75]

Hello, at 1.4 volts the BIOS doesn't even start; it needs 3.3 volts.
I also bought a used motherboard on Ebay (Lenovo T490s) and then noticed that a diode over D2101 was missing and only 1.5 volts came to pin 8.
In this case I replaced the diode and then it worked again.
It would also be helpful to have a picture of the soldered chip.
Upload a picture of your chip once.
I don't know how advanced their equipment and skills are for such repairs.

Thanks for sharing the information. You're right. The diode around the bios chip is bad possible due to overheat when desoldering. I checked the diode forward bias is ~1.5v, which is not normal, it should be ~0.5v. The large bias pull down the vcc. I need to find the replacement, hopefully the problem would be solved.

[Next2wireless]

Thanks for sharing the information. You're right. The diode around the bios chip is bad possible due to overheat when desoldering. I checked the diode forward bias is ~1.5v, which is not normal, it should be ~0.5v. The large bias pull down the vcc. I need to find the replacement, hopefully the problem would be solved.

Is it solved after diode replacement, cause I'm facing the same issue no boot after programming the bios and just the fan getting spin continuously after plugin the battery

And is it anyware related to USH part?

[niggi]

Re: DELL Latitude 7430 need clean me



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thanks u ok file

[danish8717]

dell latitude 7430 no display
ST-72WXVV3
mother board code LA-L582P

[Abracadabra100]

Hi, can anyone help me to unlock bios
ST - 3GPV0T3

[SMDFlea]

Thread merged.

[Akhlz001]

Could you post the bios file?

[Abracadabra100]

I could only get dump from other laptop

[Abracadabra100]

Here

[shiyab]

Here

post both file

[Abracadabra100]

thats both chips that i found on mb, there was another one, but it looks like its for usb-c

[rex98]

thats both chips that i found on mb, there was another one, but it looks like its for usb-c

find the 8mb chip. its marked with 25q64

[Abracadabra100]

I found it on other side of MB, but 25q64 is low profile chip and i cant reach its pins without desoldering, but thats fine. Only problem i dont have tools with me to do that, but once i get them i will try to dump it

[hoaca388]

I found it on other side of MB, but 25q64 is low profile chip and i cant reach its pins without desoldering, but thats fine. Only problem i dont have tools with me to do that, but once i get them i will try to dump it

https://shopee.vn/Bigdealsnice-Sop8-...2-a49d844c16a7

[has don]

can anyone plz unlock bios admin password
dell latitude 7430
LA-L581
SERVICE TAG 9X7GNN3

[shiyab]

can anyone plz unlock bios admin password
dell latitude 7430
LA-L581
SERVICE TAG 9X7GNN3

hi try