ianbak
Senior Member
Last Activity: Yesterday, 09:33 AM
Joined: 04-14-2023
Location: Hampshire
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Thank you so much - all unlocked now!... -
Here is the locked BIOS dump from my Lenovo X395 (Type 20NL-001HUK, Serial Number PF-1FNHLZ, Board Type NM-C181).
I would appreciate it if someone could unlock it for me, as I understand that Autopatcher alone will not be sufficient....Leave a comment:
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I was thinking - if I'm going to write back my original BIOS once I have removed the password, does it even matter if the patched BIOS I use is from my own laptop or will any one do?Leave a comment:
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Hi,
I have a Dell Vostro 15 3578, Service Tag 4GK50P2, board type Vegas/Turis MLK KBL-R17841-1.
The problem is that it cannot identify its battery as a genuine Dell one (which it is!) and refuses to charge it. It seems to be a BIOS fault, as I found another BIOS for the same machine on this site and after flashing it everything worked perfectly - right up until I tried to exit manufacturing mode. Setting the machine type in the BIOS immediately caused the problem to return. (Someone else on the site seems to have faced exactly the same issue - 'Amazing battery charging...Leave a comment:
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I once had exactly the same problem with a Lenovo and it was because the BIOS I'd flashed wasn't quite the right one for the motherboard. Often a single Lenovo model can use two different motherboards, depending on when it was built. For instance, an L13 Yoga can be of Type 20R5 or Type 20R6. Check very carefully whether the BIOS you have used was the correct one for the specific motherboard you have.Leave a comment:
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The power from the charger is reaching the mother board - that's what you're measuring on the red wires.
There's a pinned thread here https://www.badcaps.net/forum/troubl...arging-circuit that explains where things go from there.Leave a comment:
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Dell Vostro 3578 Battery Error
Hi,
Please can anyone shed some light on why my Dell Vostro 3578 is giving the following BIOS error: 'The primary battery is not identifiable and this system will not charge this battery pack.'?
The problem is not the battery - I've tried three different identical ones, all Dell OEM. They all work perfectly in other systems (different models, though) whilst giving the same error in the Vostro.
The laptop will run happily from the battery if it is charged and Windows accurately reports the charge level, proving that the communication between the laptop and the battery... -
This is why I prefer to use a clip to extract the data rather than to desolder the IC! The ones that you get typically with a CH341 are rubbish, but the ones with spring-loaded needles that you can get quite cheaply on AliExpress work for me everytime! The only challenge is that you have to hold it in place with one hand whilst controlling your programmer software just with the other!Leave a comment:
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Yes, I've successfully used it several times before. If there is more than one BIOS chip and it doesn't find the correct pattern in first one it's always found it in another. This time, though, it doesn't finds it in either - and as far as I can tell they're the only two BIOS chips in the system....Leave a comment:
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Hi,
I have a Dell Latitude 5500 (Service Tag JH83733, motherboard LA-G901P) which is locked with an -8FC8 BIOS password.
I have successfully read and verified the contents of both the 8 and 16 MB BIOS chips (attached).
Normally I would unlock this myself with the Rex98 Patcher, but with both of these files it says '8FC8 Hex Pattern not Found'.
Can someone please explain what I might be doing wrong, or unlock the files for me? Thanks!...Leave a comment:
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Looking at the application diagrams for the 9241H, Intersil recommend using an R/C filter on pin 29 (AMON/BMON). So if one of the pads of the missing component is connected to pin 29 and the other to ground, then it would seem very likely that you have knocked off the capacitor that forms part of the R/C filter. I have no idea what value you should replace it with - the only way to find out is to find a circuit diagram or measure another motherboard. That said, if this is the case then the laptop will almost certainly work absolutely fine with the capactor missing!Leave a comment:
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Dell Latitude 7290 Power Cycling
Hi,
I have a Dell Latitude 7290 that power cycles instead of turning on. The circuit board is an LA-F311P
I have systematically checked pretty much every internal voltage, and they all seem to be present except for CPU Vcc_Core, which doesn't turn on.
The impedence the Vcc_Core coils is 8.3 Ohms, though, which seems reasonable.
Vcc_SA does get enabled, and reads 1.05V. This is driven by the same power controller IC as Vcc_Core, so I am assuming that that is good.
There is no Vcc_GT, but I have read that that can be normal as it only turns on when GPU... -
Even Google has no results for w25r512jvl. Are you sure that that's the correct chip type?Leave a comment:
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OK, so it looks like I'll be sticking with the generic BIOS. Which is fine. Does anyone know if this Auto-Patcher issue is likely to be fixed?...Leave a comment:
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I can confirm that the BIOS file from post #3 works fine as an alternative, but it would still be nice to keep the original one and to understand why Auto-Patcher isn't working for me.Leave a comment:
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Hi all,
I'm trying to remove the supervisor password from a Lenovo 305-15IBD (serial number MP13EAJA, board LA-B092P). I've used Autopatcher successfully before, but with this one I get the same error message that some others have reported:
Using UEFIReplace to inject 2 DXE drivers...
[1/2] BootOption (GUID e0746c42-d3f9-4f8b-b211-1410957b9ff5)
c:\temp\bios_original.bin is corrupted or does not contain a valid dump.
There was an error... Aborting.
I don't think that the file I'm using *is* actually corrupted or invalid, because I can...Leave a comment:
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Hi Cappernicus,
Thanks so much for that! I didn't get a notification so I've only just seen your reply. I'll replace it and see if things improve!Leave a comment:
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Definitely the second, and probably the first as well!Leave a comment:
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Toshiba R940 with water damage
Hi,
I have a Toshiba R940 which doesn't power on (fully) due to liquid damage. The mother boards is FAM2SY2 A2356A.
Most of the corrosion has cleaned up well, although I can see a few joints that need touching up. More troubling is the fact that one of the components appears to have been eaten off the board. You can see it if you zoom into the attached photograph, and it is clearly missing in the close up view.
I can't find a schematic for this motherboard, and wondered if anyone had any ideas about identifying the missing component?... -
Hi, I have a Lenovo L470 that does everything apart from POST - it powers on, bleeps if there's no RAM installed, all voltages are present, the CPU warms up and the battery charges. My working assumption is therefore a corrupted BIOS.
It would therefore be great if someone could take the configuration information from the attached BIOS dump and copy it into a fresh image for me.
The laptop is an L470 Type 20J5 with a NM-B021 motherboard, serial number PF-0UY199
Thanks!...Leave a comment:
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