Re: DELL XPS L502X Core I7 Master Bios Password

It must be possible to reprogram the password when the machine is still able to boot to whatever OS. But as far as I know, this is one of the best kept secrets of BIOS manufacturers.

Thinking of it, although I've never tried it, I think it must even be possible to flash your BIOS with something different without having the password. You only still won't be able to access the settings. Maybe someone can even mod an existing BIOS to skip the password question. Then reflashing this modded BIOS will give you access to its...

Re: DELL XPS L502X Core I7 Master Bios Password

Flashing the BIOS doesn't reset the password. The password is stored in a separate chip. See [URL="https://www.badcaps.net/forum/showpost.php?p=345130&postcount=8"]post #8[/URL] for instructions how to reset the password, although this method may not work. If it doesn't, you need to reprogram the chip that has the password stored. This is pretty simple to do if you can solder and have access to a second computer with a real parallel port (not a USB to parallel converter) but at the same time it is extremely risky because...

Re: DELL XPS L502X Core I7 Master Bios Password

Hi Kpax7, did you already succeed in building a flasher? I made one yesterday and I can confirm it works like a charm! I can just advise you to use wires that are not too thin (I used magnet wire first, but got no stable reads until I changed to kynar wire). Take the wire gauge from CapitanKasar's pictures as a reference. And use a battery for power. When using a power supply instead of a battery, you [i]must[/i] install a capacitor, otherwise you will not get stable reads.Re: DELL XPS L502X Core I7 Master Bios Password

Re: DELL XPS L502X Core I7 Master Bios Password

You're welcome. I'm just passing the knowledge that was shared to me by others.

If your only problem is the BIOS password, then you don't need to bother about the EC chip afaik (can someone deny or confirm this?).

Take the dumps from guriji from this post, they should work although I haven't verified them personally: [url]https://www.badcaps.net/forum/showpost.php?p=367831&postcount=6[/url]

The best would be to obtain some spare chips, they're really cheap on eBay. And backup your own chip...

Re: DELL XPS L502X Core I7 Master Bios Password

The ghetto programmer you're linking to is similar, but not identical, to the one I mean. You can find the right one in the first post of the Notebookreview thread, which you can find here: [url]http://forum.notebookreview.com/dell-xps-studio-xps/635536-l502x-modded-bioses-download-gpu-voltages-more.html[/url]

The description of the programmer is near the end of the first post. You can also find the necessary programming software there, it's just a small pack. You need to create a DOS bootable USB stick, which you have...

Re: DELL XPS L502X Core I7 Master Bios Password

BTW. the ghetto programmer should also work for the EC chip (Sorry for double posting. Doesn't this forum have an edit button for your own posts?)

Does anybody know what information exactly is stored in the EC chip and what information is stored in the BIOS chip, besides the BIOS itself?

Re: DELL XPS L502X Core I7 Master Bios Password

Instead of using the programmer, you can also use the "ghetto" programmer from CapitanKasar, which he describes in the notebookreview forum thread that already has been linked a few times in this thread.