Question about Acer Extensa 503T Notebook

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Computers Good morning, I have an old Acer 503DX that needs CMOS battery replacement. Can someone advise how to get access to that battery. Thank you, Bob

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Re: Computers

First you need to remove the keyboard to gain access to the CMOS battery (Acer call them a RTC battery)
Tell you what give me a email address and I'll send you the service manual.


Posted on Jan 08, 2008

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Re: Computers



Posted on Jan 08, 2008

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Computer was locked

Resetting the CMOS password on an Acer Aspire laptop is much more difficult than resetting the password on a desktop.
Disassembly steps vary from model to model, but on most models, you'll have to take apart the computer to access the CMOS battery.
Don't take apart the notebook if you don't have experience disassembling PCs.
After turning off the computer and disconnecting the AC adapter, take out the battery (different from the CMOS battery).
All visible screws must then be removed from the bottom of the notebook.
Remove all components stored to their separate compartments on the base of the notebook.
Turn over and open the PC. Lift up the switch cover and remove the screws securing the keyboard to the PC, if any are visible.
Remove the keyboard.
Remove the screws securing the monitor to the hinges, and then set the monitor aside.
Disconnect all visible cables connected to the motherboard; and then remove the screws from the top cover.
Remove the top cover to reveal the motherboard. Locate and then remove the CMOS battery. Leave it out of the notebook for 24 hours; then reinstall it and reassemble the Acer Aspire.
Other Options
If removing the CMOS battery fails to clear the password, or if you dont feel comfortable with the idea of opening your computer, you might be able to gain access to the computer using a backdoor password.
These special passwords were implemented to allow technicians to access locked computers. Not all models recognize backdoor passwords.
Most Acer Aspires use the Phoenix BIOS, and backdoor passwords for this BIOS include BIOS, CMOS, phoenix and PHOENIX.
All of these passwords are case-sensitive.

Apr 22, 2013 | Acer PC Laptops

1 Answer

I have an HP Centario that is as old as dirt. I believe it is running Linux. Anyway I purchased this computer and every time I power it up it starts off with a blue screen that says 'power on...

Old computers/laptops with Power on Password can remover easilt by removing the CMOS battery for 15 mins. Replace the CMOS battery and go into the BIOS setting to set the Date & Time.

Feb 22, 2013 | PC Laptops

1 Answer

How can i remove the password of bios of Acer Aspire 1642ZWLMi . i have forget it and i can not access to the boot menu. thank you


You have to remove the CMOS battery located in your motherboard or you need to adjust the CMOS jumper of your laptop

Feb 22, 2011 | Acer Aspire 1642ZWLMi Notebook

1 Answer

I have followed advice on removing cmos battery neither are correct have removed keyboard as described but there is no metal plate with four screws giving access to battery, please help

HI, the bios battery in this machine can only be accessed by total strip down. It is located on the bottom of the motherboard under the finger pad. The connector is actually behind the hard drive connector but the HDD connector is in the way so it cannot be accessed through the HDD space. The battery is double sided taped to the heatsink on the graphics processor unit. There is no access through any panel or port. If you are not up to totally stripping the machine to remove the motherboard please take the machine to someone who can do this for you.
Hope this helps
Steve, Olive Country Computers in Spain

Jan 10, 2011 | Acer Aspire 9300 Notebook

1 Answer

I am trying to located the area to replace the BIOS Battery on the system

I couldn't find any information about the cmos location, but I've seen videos on finding it on other computers, and you have to get down below the keyboard to find it. On some computers, it can even be beneath the cpu, but on others it's at the front, and easily accessible. You can check out some videos on YouTube, and they show the process on certain computers- that will give you an idea of what you have to disassemble. Otherwise, you will need a service manual, and here is a link to one:
Good luck, and hope this helps.

Jun 28, 2010 | Acer Ferrari 3200 Notebook

10 Answers

Acer extensa 5630ez won?t turn on.

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.

Mar 05, 2010 | Acer Extensa 5630-6806 Notebook

2 Answers

Where is the location of the Cmos battery for my

You really need a service manual to try & locate the CMOS battery. With laptops the CMOS battery can be different on each model. These are often located on the motherboard below the keyboard, but a service manual should help you.

Nov 01, 2009 | Acer TravelMate 240 Notebook

3 Answers

How do I replace a dead cmos on acer 4520LCi travelmate laptop? The laptop no longer keeps track of system time when shut off completely. Can you tell me the exact location of the cmos so I can be able to...


what you replace is not the CMOS, but the CMOS battery.

On an ACER from those years the CMOS battery looks like a coin, or a coin wrapped in plastic and connected to the motherboard.

On most models from same series the battery is located on the lower side of the motherboard, like on picture below:


On some model the battery may be located underneath the keyboard.

Here disassembly instructions for a similar model.

Sep 11, 2009 | Acer TravelMate 2300 Notebook

1 Answer

Cmos battery location

open the top key board then under this key board you located the cmos battery and jumper settings..good luck

Jun 26, 2009 | Acer TravelMate 2300 Notebook

1 Answer

Cmos battery?

Computer CMOS information CMOS is an on-board semiconductor chip powered by a CMOS battery inside IBM compatible computers that stores information such as the system time
How to replace the CMOS battery. Information about why time may be lost or decreasing rapidly and how to replace your computer cmos battery

Computer Battery Help The first type of battery is the backup battery, which is commonly referred to as the "CMOS battery".

Good Luck, Please dont for get to Vote/Thank You

Dec 19, 2007 | HP Pavilion N3390 Notebook

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