DELL XPS L502X Core I7 Master Bios Password

[dycc]

Hi

got a dell xps l502x locked . trying reset bios master password using hardware method ( 1-use a clean no-password dump of another dell xps BIOS
2-erase the locked eeprom chip and copy that clean one dump in , using programmer EZP 2010)

but at startup, the laptop still ask for master password.

trying dismantle the laptop and found two
eeprom chip . one of 512Kbyte and another of 4Mbyte

question

If someone have already experienced this kind of problem , which of the two eeprom hold that password. ???????????????

[dycc]

Re: DELL XPS L502X Core I7 Master Bios Password

[spidey]

Re: DELL XPS L502X Core I7 Master Bios Password

re-program that 4mb chip. 512 k chip is just for ec to power up.

[Francisco.s]

Re: DELL XPS L502X Core I7 Master Bios Password

Could be that none of them store the password, many motherboards has an I2C memory chip that stores serial number, password, etc.
In this case the schematic is the only help.
Regards.

[spidey]

Re: DELL XPS L502X Core I7 Master Bios Password

Could be that none of them store the password, many motherboards has an I2C memory chip that stores serial number, password, etc.
In this case the schematic is the only help.
Regards.

i fix 30-40 laptops in a week. And i didnt see anything like that. Clould you please show me an example ?

[Francisco.s]

Re: DELL XPS L502X Core I7 Master Bios Password

Hi spidey, the following screen capture, is from a mbx-223 motherboard, and as you can see it has a memory with the I2C bus. I don´t know if password in this model are stored in this chip, but some other models from Sony, I´m sure it is.
Also some models from Acer, like de aao have a memory with the I2C bus, and they stores serial number, uuid, etc.
Regards.

[dycc]

Re: DELL XPS L502X Core I7 Master Bios Password

still looking for 4mb dump

[Kpax7]

Re: DELL XPS L502X Core I7 Master Bios Password

Hello
I'm also badly looking for a way to break bios password for this model.
Maybe I can help. Tell me the exact way to dump that 4Mb one.
if any softwares needed for that give me the link please.
tnx

Edit>> I found this:
How do you manually Unlock and reset the password from your Dell Laptop?

To remove Dell Bios password manually: If you are Computer technicians with
superior knowledge, open the laptop, and find the Chip 24C02 on the motherboard,
and Short circuit the legs 3 and 6 during booting, See picture attached, This
same chip is located in different position in different dell laptop motherboards, Using
a bent paperclip at an angle short circuit pins 3 and 6. when the 24c02 bios chip
is not found you may also look for chip 24c04 and 24c05 Short circuit during
booting . only leg 3 and 6 should be used as shown on picture on right ->
resetting dell bios password manually

When Short circuiting legs 3 and 6 fails, you may want to try short circuit legs 4
and 5, additionally try jumping legs 3 an 7, but do know this, if you use this
information you are doing it at your own risk, it is dangerous, and you may burn
the motherboard, and we are not reponsable for anything,
we recommend buying our master password to unlock your dell laptop
With the laptop turned off, position the bent paper clip on the Bios chip proper
legs, and than turn on the laptop, this will cause a short circuit in the Bios chip
and reset the password.

[dycc]

Re: DELL XPS L502X Core I7 Master Bios Password

that is for old brand

[spidey]

Re: DELL XPS L502X Core I7 Master Bios Password

What is your mobo code ?

[dycc]

Re: DELL XPS L502X Core I7 Master Bios Password

hi spidey this the diagram

[spidey]

Re: DELL XPS L502X Core I7 Master Bios Password

http://forum.notebookreview.com/dell...ages-more.html


choose suitable dump for your laptop.

[Kpax7]

Re: DELL XPS L502X Core I7 Master Bios Password

@spidey : That's not the full dump.

@dycc: Is it the right way to dump the chip?:
http://www.sodnpoo.com/posts.xml/ard..._4mb_flash.xml

[spidey]

Re: DELL XPS L502X Core I7 Master Bios Password

@spidey : That's not the full dump.

@dycc: Is it the right way to dump the chip?:
http://www.sodnpoo.com/posts.xml/ard..._4mb_flash.xml

if you read te page carefully you will also find non modded dump. Btw what do you mean with full dump ? is it half ?

[Kpax7]

Re: DELL XPS L502X Core I7 Master Bios Password

That won't help resetting the password, I flashed the bios with that to no avail.

[dycc]

Re: DELL XPS L502X Core I7 Master Bios Password

i use this to dump chip

http://www.ebay.com/itm/EZP2010-High...-/221072211816

[Kpax7]

Re: DELL XPS L502X Core I7 Master Bios Password

DYCC: Any updates?

[dycc]

Re: DELL XPS L502X Core I7 Master Bios Password

flash bios with 4Mbytes dump but the laptop still ask for master bios password. i wonder if 512kbytes EC bios hold that password .

[Kpax7]

Re: DELL XPS L502X Core I7 Master Bios Password

The security is really high in this model :-/
I gotta ask someone tomorrow ...

[dycc]

Re: DELL XPS L502X Core I7 Master Bios Password

please someone here could give me the dump . will really appreciate