Question about HP Compaq Evo Notebook N600c

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Compaq Evo Notebook N600c model J07M040.00

I got that model from the auction but needs poweronpassword, I disassembled the case and removed the CMOS battery after 3 days still it needs the poweronpassword, I downloaded the n600c repairing manual and read it it shows where the RTC battery that I could take out too but, but in my laptop its no where to be seen, the structure is very much different, how can I clear the damn poweronpassword please?

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Ok i have had this problem

yo have a cover on the left hand side of the mouse pad covering the modem

open that pop off that batterys(including system) and take out hdd from bay

then power on laptop using power supply and then power off refit battery and power up with no hdd and try bios then

the bios security is on the hdd

hope this helps

Posted on Mar 23, 2009

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The solution of Peterjordan1 works fine to me!

the best 1 for me so far

simpel & effective

thank you

Posted on Aug 03, 2010

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Hi i wanted to know if you can help with getting the right chip i don't know which one is the bio chip

Posted on Oct 21, 2008

Thxxxxxxxxxxxxxx

Posted on Aug 23, 2008

Thanks for good explanations sir, this wasn't the solution for me, I went on internet the next day after my post, it was written that some laptops keeps power in board for more than 3 days, what I did is I removed the cmos jumper, and another jumper that was connected into modem /NIC, I left it for 7 days, after those days I put it on power with jumpers disconnected after 10 seconds, and switched it on, it took me back to CMOS settings, I jumped on my feed, put back everthing and plug it on power, I did reset my damn laptop and I use it still, the only irk I have it has little hard drive, 20Gigs thats not enough, 256 RAM well this kicks somehow fine. Again I do appreciate your efforts to help me out.

CHAOS!

Posted on Jan 12, 2008

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Hello, OK, this is a tricky thing. Laptops have a greater security protocoll then normal desktops. It woun't clear the password if you just remove the CMOS battery because the password is stored on a NAND-Flash memory that can store data even if the power is cut off. There is however a thing you may want to try. First locate your laptop's bios chip on the mainboard. If you have trouble with this please post back. After you have located it, insert the battery but remove the charger. Take a sharp metalic object. The bios chip should be a square one with pins on each side. Using the metalic object short-circuit the first 2 pins (one with the other) and the last 2 pins of each side of the bios chip. Just place the metalic object between them and keep it for like 5-10sec. Do this for each side of the chip. Then remove the battery and repeat the short circuit sequence. Then place back the battery and start your laptop. Tell me what happens now and we'll take it from there. If nothing happens, the only way to unlock the laptop would be to go to a service center and have them dissasemble your laptop and reflash your bios chip. This can be kind of expensive.

Posted on Sep 26, 2007

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Hi

I understand your problems. U remove the cmos battery and place it on back side. That is just place the battery on the same place as upside down. It will be more than enough for resetting the bias memory. Expecting your reply..

Regards
Arun

Posted on Feb 26, 2008

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You'll need to get under the keyboard or open some of the available openings on the bottom of the laptop.

What you're looking for is a battery. This is known as the CMOS battery. Once removed, power on the computer.

If it doesn't prompt you for the password, then you have successfully erased the memory.


Hope this helps :)

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