Where is the cmos battery located..removed all the panels from the bottom of the laptop and do not see it
Put your mouse cursor in the middle of the photo, and use the Zoom In feature,
http://www.ebay.com/itm/Acer-Aspire-7720-MBAHE02001-ICL50-LA-3551P-Intel-Laptop-Original-Motherboard-/370773817007?pt=Motherboards&hash=item5653d776af
Go along the Bottom edge until you come to the black round, piezo buzzer; towards the left side.
The RTC Battery is right above it. Little silver watch type battery, encased in blue plastic around it.
Has two tabs coming off of it, and these are soldered to the motherboard.
Real Time Clock Battery. Also known as CMOS Battery.
Looking at the motherboard photo, you are looking at the Bottom view.
Stand the photo view of the motherboard straight, by turning to the left a little.
Now turn it 90 degrees to the Left, for how it actually sits in the laptop case; Battery Compartment AWAY from you.
(Big round hole goes to the Top)
Also am looking at the Service Manual, for the Aspire 7720 series of Notebook PC's.
There, of course, is no guide for replacing the RTC (CMOS) battery.
Appears to me laptop has to be disassembled in order to access.
Removing RTC (CMOS) Battery because laptop won't keep time/date?
Good.
Trying to clear BIOS password?
Don't quote me on this, but I believe this one is new enough; that there is a capacitor, or capacitors; that hold a trickle charge indefinitely.
Doesn't matter if you remove the RTC/CMOS battery, or not.
Acer Aspire 7720 series of Notebook PC's - Service Manual,
http://www.tim.id.au/blog/tims-laptop-service-manuals/#toc-acer
Go to the 'paragraph' that starts with Aspire 1200. (1200 in blue)
Drop down to the 12th line, (7530G), scroll across, click on the blue - 7720.
Wear your ESD wrist strap, and connect it's alligator clip to a good ground source.
For additional questions please post in a Comment.
Regards,
joecoolvette
It is most likely under the keyboard.
SOURCE: where is the CMOS battery located on Acer Aspire
Bottom of the laptop, the big cover that comes off. Below the wlan card
SOURCE: Urgent help needed to locate cmos battery laptopasus x51r series
The cmos battery is on the motherboard and unless you are competent at disassembling laptops then I suggest you take it to a repair shop for battery replacement.
SOURCE: I can't find the cmos battery in my Acer TravelMate 512DX
you have got an older model, try this:
follow the instructions:
you will need:
a slim x-screw-driver
a sharp knife with a slim blade and
a cup or else for the screws, don't loose them!
a new c-mos bios battery model: CR-1220 (exchange it while your in there!)
you find c-mos battery and hdd under the keyboard!
- turn off the power, remove accu and charger cable, for static electricity is friendly fire
to your laptop now !
- open your screen to max. fold (angle of 180 degrees)
- look for removable plastic part near to left holder of screen
- carefully remove it
- also remove plastic panel right to it in the section between display holders
metal should be visible now
- carefully! remove keyboard, starting at the left side, continuing topside
as you won't be able to fully remove it, simply turn it over
- unscrew any screws holding the metal plate, remove it
- now you see: left the CPU plus cooler, top right middle the hdd still in an adapter attached
to the mainboard, at it's lower right the C-MOS battery (g
- turn loos these screws
- carefully remove the frame/adaptor holding the hdd
- unscrew again the adaptor
- seperate hd fram adaptor
... and gotcha!
be careful to get a proper notebook hd (samsung or such)
exchange CMOS-battery by chance
reattach new hd to frame, again carefully!
to reassamble: rewind the procedures
put everything back in place
replug, pray and turn on the lappie.
wish you luck.....
Testimonial: "Thanks for all of the information. The keyboard was destroyd during the removal process so we bought a new one instead."
SOURCE: How do I remove keyboard on acer aspire 5510
Underneath your laptop there should be to screws with a small logo of a keybord remove the screws then gently lift the keybord with caution as there maybe some retaining clips holding it in place, then remove the cable by sliding the retaining clip out,
SOURCE: aspire 5520z cmos battery location.
Here it is:
You may need to desolder those pins to reset
Remove the
Phillips screws that secure the motherboard cover (refer to your owner's manual
if necessary), then release the cover from the clips on the bottom of the
plastic casing.
Lay the cover
aside, then locate the CMOS battery cable on the right side of the motherboard.
Unplug the cable, then remove the battery.
http://www.youtube.com/watch?v=cg_wvp1YdSI
laptop cmos battery
Before you start 1) Read through the owner's manual for your particular Acer Aspire laptop to determine what kind of CMOS battery you need. 2) Purchase the battery through Acer or a local or online computer parts dealer. 3) Turn the laptop off and unplug it. Also unplug any external hard drives, cameras, or other external devices. 4) Turn the laptop over (bottom facing up), then touch something metal to remove static charge. Removal of the CMOS battery Remove the Phillips screws that secure the motherboard cover (refer to your owner's manual if necessary), then release the cover from the clips on the bottom of the plastic casing. Lay the cover aside then locate the CMOS battery cable on the right side of the motherboard. Unplug the cable then remove the battery. The battery should look something like this
Plugging the new battery in
Plug the new CMOS battery cable into the motherboard. Slide the battery partially under the laptop casing (somewhere to hold it in place), then align the cover with the slots on the bottom of the laptop housing. Replace the screws then turn the laptop back over.
Finalizing
1) Turn the laptop on.
2)Enter your BIOS (usually by pressing the "Delete" key) before the operating system loads.
3) Follow the BIOS prompts or refer to your Acer Aspire owner's manual to reset your time, date and desired system settings.
Reason: Anytime the CMOS battery is unplugged for more than a few seconds your BIOS will be reset to the default manufacturer settings. If you make any changes to the BIOS that cause problems with your Acer Aspire, unplug the CMOS battery for 3 to 5 seconds to correct the problem.
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Thanks.
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