There will be small CMOS battery inside the board. It will be like the size of quarter. It will be on the motherboard and sometimes it does not work like it should.
Why do I need CMOS battery?
While most people focus on the hardware when it comes to Apple products, it is important to remember that the software is just as important. With that in mind, today we are going to be looking at the CMOS battery in the iMac and how to replace it.
The CMOS battery is responsible for keeping track of the time and date in your computer, and it is located on the logic board. If you notice that the time and date are resetting frequently, or if your computer is having trouble starting up, then it is probably time to replace the battery.
How do I replace the CMOS battery?
Replacing the battery is a pretty simple process, but there are a few things you need to know before you get started. First, you need to shut down your computer and unplug all the cables. Then, you need to remove the back panel so you can access the logic board. Be careful when removing the back panel, as there are a lot of delicate components inside your iMac.
Once you have access to the logic board, you will see the CMOS battery near the bottom. It is a small, cylindrical battery, and it is usually held in place with a piece of tape. Gently remove the battery and replace it with a new one.
That’s all there is to it! Once you have replaced the battery, you can put your iMac back together and it should be good as new.
We work on following iMac Models:
iMac (24-inch, M1, 2021)
iMac (24-inch, M1, 2021)
iMac (Retina 5K, 27-inch, 2020)
iMac (Retina 5K, 27-inch, 2019)
iMac (Retina 4K, 21.5-inch, 2019)
iMac Pro
iMac (Retina 5K, 27-inch, 2017)
iMac (Retina 4K, 21.5-inch, 2017)
iMac (21.5-inch, 2017)
iMac (Retina 5K, 27-inch, Late 2015)
iMac (Retina 4K, 21.5-inch, Late 2015)
iMac (21.5-inch, Late 2015)
iMac (Retina 5K, 27-inch, Mid 2015)
iMac (Retina 5K, 27-inch, Late 2014)
iMac (21.5-inch, Mid 2014)
iMac (27-inch, Late 2013)
iMac (21.5-inch, Late 2013)
iMac (27-inch, Late 2012)
iMac (21.5-inch, Late 2012)
iMac (27-inch, Mid 2011)
iMac (21.5-inch, Mid 2011)
iMac (27-inch, Mid 2010)
iMac (21.5-inch, Mid 2010)
iMac (27-inch, Late 2009)
iMac (21.5-inch, Late 2009)
iMac (24-inch, Early 2009)
iMac (20-inch, Early 2009)
We provide repair services in following cities:
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FAQs
Q. How long usually CMOS battery lasts?
A. CMOS battery on the computer last around 8-10 years. Mostly it will depends on how the computer is used and how it is stored, those factors plays determines the lifespans
Q. What is difference between BIOS and CMOS?
A.Bios is the programs that loads the operating system and turn up the computer, CMOS battery is the battery that keeps the bios and help it power.
Q. Does CMOS have memory?
A. CMOS is powered by the CMOS battery and it holds the memory for bios to store important information to boot the iMac.
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