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CurryE
Bronze

Latitude E6420 DELL secure manager

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Hi guys I am having an issue with my laptop. It was updated using dell drivers and apps that match the service tag and everything was working smoothly until I rebooted today and now a password is requested on the bios screen before I can go any further. I don't have a password on my OS or my bios but this Dell secure manager must have chosen a default one on my behalf. Now I can't get into anything, it won't boot to CD drive or usb it just stays on this bios password screen. I tried nearly everything I could think of. I removed the cmos battery. Tried various possible default passwords and nothing. I don't really want to try shorting the nvram chip, too much could go wrong with powering up a disassembled laptop and even then it might not work. Any help at all would really be appreciated.

4 Replies
CurryE
Bronze

RE: Latitude E6420 DELL secure manager

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Ok update for anyone interested. I was unable to source any help for this and conversations with Dell where non productive. The only safe option I had was to replace the motherboard. So in respect of this option I decided there was nothing to lose in attempting to reset the nvram chip.

The most irritating part is disassembly in the hope that you will detect the chip before complete disassembly is achieved. I found the chips where placed conveniently under the keyboard and are easily accessible. There are 2 x 8 pin winbond chips side by side 25Q16CVsig and 25Q64CVSIG, the one I concentrated on was the 8MB chip 25Q64CVSIG. If you look up the datasheet for the component you will see pins 5 and 6 are signals CLK and Serial Data In, these are the 2 pins we need to short. If you are unsure which pin is which, if you look at the chip you will see a circular impression on the chip face, this is indicating pin1 and the numbers increment in an anti clockwise motion.

First thing I did was reconnect drives and anything that you way have disconnected and then I tested a normal boot to make sure everything was connected correctly and you will notice the Dell secure manager is still appearing. Now reboot and whilst rebooting connect a small wire or loose piece of solder between these 2 pins and the PC should boot up bypassing this password request allowing you to boot into the OS. Delighted this worked first try I wanted to make sure it did not happen again so I opened up dell secure manager software that was installed and looked for the change password option and was able to change the password to something I can easily remember. I then rebooted with everything reconnected and housed without the nvram chip reset and the dell secure manager popped up again but this time I entered the new password I had just set in windows, held my breath for a few seconds and it accepted this password.

I hope this helps anyone else with the same issue because I had definitely not set a password within Dell Secure Manager software before this issue arose and can only conclude that by not setting one Dell software create a default for me and this is impossible to figure out. Good Luck.

CurryE
Bronze

RE: Latitude E6420 DELL secure manager

Jump to solution

Ok update for anyone interested. I was unable to source any help for this and conversations with Dell where non productive. The only safe option I had was to replace the motherboard. So in respect of this option I decided there was nothing to lose in attempting to reset the nvram chip.


The most irritating part is disassembly in the hope that you will detect the chip before complete disassembly is achieved. I found the chips where placed conveniently under the keyboard and are easily accessible. There are 2 winbond chips side by side 25Q16CVsig and 25Q64CVSIG, the one I concentrated on was the 8MB chip 25Q64CVSIG. If you look up the datasheet for the component you will see pins 5 and 6 are signals CLK and Serial Data In, these are the 2 pins we need to short. If you are unsure where these pins are, look for a small circular impression on the face of the chip, this is indicating pin 1 and they are numbered incrementally in an anti clockwise motion.

First thing I did was reconnect drives and anything that you way have disconnected and then I tested a normal boot to make sure everything was connected correctly and you will notice the Dell secure manager is still appearing. Now reboot and whilst rebooting connect a small wire or loose piece of solder between these 2 pins and the PC should boot up bypassing this password request allowing you to boot into the OS. Delighted this worked first try I wanted to make sure it did not happen again so I opened up dell secure manager software that was installed and looked for the change password option and was able to change the password to something I can easily remember. I then rebooted with everything reconnected and housed without the nvram chip reset and the dell secure manager popped up again but this time I entered the new password I had just set in windows, held my breath for a few seconds and it accepted this password.

I hope this helps anyone else with the same issue because I had definitely not set a password within Dell Secure Manager software before this issue arose and can only conclude by not setting one Dell software create a default for me and this is impossible to figure out.

bogaskilop
Copper

RE: Latitude E6420 DELL secure manager

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maybe you are also familiar with e6540 which chips they got?

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will4luv3
Copper

RE: Latitude E6420 DELL secure manager

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I tried the same procedure with the paper clip on pin 5 & 6 anticlockwise starting from the indicated pin 1. My chip is registered CFEON Q16-100HIP AND CFEON Q64-104HIP.

What happens is that when you boot up the laptop.Nothing shows up on the screen for about 10 to 15 second, then it shutsdown.You can wait for about 30seconds but the laptop will still remain idle.

You Can  try the same procedure over n over but you will get the same results.

Need your Help on this. THank you

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