The CMOS battery is under the CPU fan and heatsink. You must remove the vented plastic cover on the bottom of the laptop. Then remove the CPU fan and heatsink assembly by loosening the four retainer screws and carefully unplugging the fan electrical connector. Then CMOS battery is under a cutout in the copper foil RF shield.
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The CMOS battery is the small silver round battery on the motherboard. Be warned though, this will reset all of the time, date, and optimized settings in the BIOS. You will most likely need to reset all of that information.
you have forgot BIOS password then you have to reset CMOS jumper
setting. Please follow the below steps: Open the Laptop back panel.
Locate the CMOS battery, remove it & then with the help of a screw
driver keep on pressing the terminal inside it and turn ON the computer
for 10 secs and Turn Off (make sure you keep on pressing the terminal
with a screwdriver while turning ON). It will short the BIOS setting.
Now, fix the CMOS battery & restart the computer. This will take
care of the issue.
Can you give a location of R138? Is it on the easy side? E.q. the side of the motherboard wich is accessible by removing the bottom plate? I see Q24, located close to CPU. If possible, post a picture of R138, with some components visible.
Hi there. Look on the motherboard for the battery, the jumper should be near that and with most motherboards should be marked with "CLR_CMOS" like this >>>>>
If you cannot find the jumper then chances are the board does not have one so to clear the cmos you have to take the motherboard battery out for an hour or so making sure you remove the power cord from the back of the machine.
Please post back with the results and more help if needed, good luck and thanks for using FixYa!!
you will need to reset the BOIS by removing the CMOS battery of your laptop and placing it back after about 10sec or short the jumper for the CMOS. this requires you to open your laptop and locating the CMOS battery cell on the motherboard.
The CMOS battery is located on the motherboard, just under the bottom left side of the keyboard, by the letter 'V". It looks like a clock battery, marked 3V (volts). The battery comes out of its "cage/connector" by gently lifting it with a small flat screwdriver. Replacement CMOS batteries are inexpensive and readily available at any computer shop. Hope that helps
The Time And date Settings.
Are held Within The CMOS Battery.
This is usually on the Motherboard. ( Looks like a small round silver Coin )
They are quite easy to replace, usually about 3v-3.3volts.
Don,t change the CPU Or motherboard.
Just the Battery.