Question about Dell Inspiron 1520 Motherboard

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Diagram where is the CMOS chip located

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Schematics for pavilion501n motherboard


In order to locate a schematic for a specific motherboard, you need to know the motherboard's manufacturer name, mode number and revision number which is stamped on the board. You cannot ask for a computer's motherboard diagram based on the computer brand name and model number.
How to Check Your Motherboard Model Number on Your Windows PC
You can use the the aforementioned link to also get the same info specs of the motherboard without opening the case by using the Command line (CMD.exe) or by downloading a GUI based software app.
However, I prefer looking at the main board for the stamped info.
How did you determine that the CMOS chip is re-configuring itself?
Are you confusing the BIOS with CMOS, which are two separate and distinct components.
If the CMOS battery on the motherboard grows weak, or becomes dead, your BIOS settings will reset each time you power off the computer.
Most CMOS batteries are replaceable; some manufacturers solder them in place.
One of the first tell tale signs of a weakening or dead CMOS battery, is having to reset the system clock.
Try changing the CMOS battery; make sure your computer is unplugged from the wall outlet (or Back-UPS); then replace the CMOS battery; plug the computer into the wall outlet (or Back-UPS); power up your computer, enter the system BIOS and configure it to your specs; remember to save the changes; warm reboot; after POST and O.S. start-up; turn off the computer normally- wait 10-20 seconds, do a cold boot to verify that the system BIOS configuration did not change.
Unless you had an electrical surge or spike that would damage the CMOS chip, in which case you might get a checksum error or.... someone is playing tricks on you by resetting the CMOS chip via its jumper; the only other culprit I can think of off hand is virus code infection to the CMOS chip.

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1 Answer

Where can i down load schematics for this the motherboard was made by HamStarr on the motherboard is says Dell DAOVO2MB6EO OR DA0V02MB6E0 ?


Its better to just look up the chip nomenclature of all the chips on the board, One is going to be an NVRAM or EEPROM chip of 2MB or less, usually a very small chip at that. And it may have a sticker on it saying AMI or Phoenix or other BIOS manufacturers.

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It would be located under the bottom of the laptop. It is probably very near the silver wafer CMOS battery.All laptops are slightly different on location. I think the chip itself is short in size.

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Where is cmos chip located on 5253-bz656 acer


How to get rid of the bios password on Acer Aspire AS5253 BZ661 Laptop...

You'll need to disconnect the main battery and the cmos battery so no power goes to any part of the system.

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1 Answer

Dell latitude e6400 system or administrator password


So you have a locked BIOS password.. this can be quite difficult to get past. There is one way which i have tried which is a hardware hack. It worked for me multiple times but i will say do at your own risk. It wont effect the hard drive at all.

Turn the laptop over and find the bit that you can open where the RAM upgrade goes into. Usually has a little chip (technology chip) as a symbol. Open that bit up and look for some text on the motherboard called CMOS its a circuit chip thats on the other side so you would just see little bits of solder going around in a square. its small too.

Once you have located it get a flat head screwdriver (must be flathead) and put the flat head screw driver on the CMOS chip bit so that you short circuit the CMOS chip it must touch a few of the solder bits on the motherboard to shortcircuit but only the CMOS chip. when you have the screw driver on the right bit turn the laptop on with the screwdriver still shortcircuiting the CMOS chip. When the computer starts it will say something along the lines of CMOS error or CMOS cannot load and it will reset the BIOS password.

Good luck

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Hello, the other day my friend was attempting to help me flash my Dell Inspirion 1525 PP29L's Neprom to reset or clear the dell password that was set on the motherboard because I locked myself out... and...


You are not looking for a chip on the motherboard, you can reset your motherboards CMOS password by removing the circular silver battery (which should come out very easily) and then replacing it. Many motherboards also have a series of pins with covers on them that can be orientated to reset the CMOS, try checking your computers manual for those. Its not recommended that you remove any chips from your motherboard. Hope this helps.

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1 Answer

Toshiba Satellite A55-s1066 need help Loacting Bios Chip.


you need to remove all at same time and memory modules too, and after remove the cmos battery, try to find a passw clear switch on the motherboard nearby cmos battery.

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1 Answer

Will not power up after failed bios update


If the BIOS update failed it could have damaged the CMOS chip & may not be repairable without a new CMOS chip.

Oct 21, 2009 | Computers & Internet

3 Answers

C840 need to locate bios chip


If you are just looking to get past the power on password, there are two easy ways and do not require you to mess with the BIOS chip itself.

1. Unplug power cord from computer, then hit the power button to discharge stored electricity (safety). Open up your computer case and look for your battery. It is just a thin lithium battery. After you have found it, remove it. Leave it out for a few seconds (I always leave it out around 30 seconds) and put it back in. Then plug the computer back in and it should now be password free.

2. Locate (if equipped) the CMOS jumper. It usually is just like a hard drive jumper and covers 2 pins out of 3 that are in a row. Make it jump the pin that was not jumped before. Then move it back to original setting and boot up your computer...no more password.

Hope this helps.

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1 Answer

Need hardware manual or information to remove cmos battery


Removing CMOS battery resets BIOS password. CMOS battery is located right beneath the keyboard. Turn laptop upside down and unscrew the topmost layer at the centre, beneath keyboard. U shud see CMOS battery silver. REmove, hold for abut 1min, reinsert, powerup ang enjoy!!1

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