Replace CMOS Battery on Toshiba L745D

I need to reset BIOS Password on Toshiba L745D. I am unable to find the Jumper (B500?) on motherboard, so want to replace CMOS battery, however, the battery is locked with a plastic cover which is soldered to motherboard. Any help is greatly appreciated.

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Pranay Sharma Nov 16, 2013

Image

Image
Pranay Sharma Nov 16, 2013

Battery Cover

Battery Cover
rstar111 Nov 16, 2013

Thanks for the images they really help. Thanks for the images they really help.

1 Answer

rstar111

Contributor 5 Answers
Posted on Nov 16, 2013

rstar111

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You may be able to reset the bios by shorting out the battery leads for 30 seconds. This may however completely drain or damage the button battery.
The only other way to fix this would be to unsolder the battery and solder a new one back in I've done it before on a dell laptop.

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Pranay Sharma Nov 16, 2013

Update: I was able to pop out the battery by twisting the plastic a little bit.
Pranay Sharma Nov 16, 2013

The password is STILL THERE! Battery was out for 24 hrs, but no affect on BIOS Password. Please help!!
rstar111 Nov 16, 2013

Even with the battery out you need short the battery connection. You can do this by placing the battery in upside-down. If that doesn't work you may need to flash the bios.
rstar111 Nov 16, 2013

Otherwise you can try these suggestions.http://www.fixya.com/support/t7705112-re...

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Anonymous

2351 Answers
Posted on Feb 06, 2008

SOURCE: I changed RAM settings in BIOS, now I can't boot - need to clean CMOS

Pg. 1-15 in your manual. Do both. Clear the cmos by switching jumper to pins 2&3. Make sure the power cord is unpluged. Use a flat head screw driver to help you lift out the battery. Wait a few seconds. Pop the battery back into it's holder & reset the cmos battery back to pins 1&2. Plug the power cord back in. Boot the Pc & press the delete key to enter the bios. If the Pc is beeping remove the memory & reseat. Try another boot up.
Award BIOS Beep Codes: Repeating (endless loop). Check for improperly seated or missing memory. If beep still continue, only place 1 dimm in slot A closest to CPU. Do not forget to unplug power cord before messing with the memory or switch the PSU to off. Wait for the green light on the board to go off.

Anonymous

37 Answers
Posted on May 19, 2008

SOURCE: CMOS resetting Clearing

I had the same problem.

I fashioned a small piece of wire, and with each end, shorted the two sides of the battery together, - thereby removing the BIOS settings through a loss of power.

Do this only briefly though - you don't want to drain / destroy the battery altogether, as this will hold your future bios settings in the cmos chip.

Good luck,

Erik.

Anonymous

2 Answers
Posted on Jul 09, 2008

SOURCE: elite K7SEM Cmos battery replacement problem

Try to verify the real battery voltage and polarity (use multimeter) or cleaning the socket contacts.

Anonymous

64 Answers
Posted on Jan 29, 2009

SOURCE: CMOS battery getting hot.. bad jumper setting... help!!

you can downlaod the manual which shows the jumper settings, plus diagnostic software and drivers for your board from the makers website at the address listed below.
http://support.asus.com/download/download_item.aspx?product=1&model=K8S-MX&SLanguage=en-us

Please rate this answer and good luck.

Terry

95 Answers
Posted on May 16, 2010

SOURCE: Where is cmos reset jumper? Is it near battery,

Try

http://support.acer.com/acerpanam/manuals/acer/0000/servicemanuals/S.G_Aspire_M5640_M3640M1640_BOOK_VerC.pdf

page 77

label CLR CMOS 3 pin type 1-2 clear 2-3 normal

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How to remove bios password in toshiba satellite A305-s6905 laptop? i tried removing the battery,but it didnt work... it asked me for a JO pin,which i was unable to find.

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Replace CMOS Battery on Toshiba L745D