![]() HP’s MSRP price is shown as either a stand-alone price or as a strike-through price with a discounted or promotional price also listed. Contract and volume customers not eligible. Orders that do not comply with HP.com terms, conditions, and limitations may be cancelled. Items sold by HP.com are not for immediate resale. These terms apply only to products sold by HP.com reseller offers may vary. Correct prices and promotions are validated at the time your order is placed. Despite our best efforts, a small number of items may contain pricing, typography, or photography errors. Quantity limits may apply to orders, including orders for discounted and promotional items. Price protection, price matching or price guarantees do not apply to Intra-day, Daily Deals or limited-time promotions. Once you find the CMOS battery type installed in your motherboard, get a new one and replace it.Prices, specifications, availability and terms of offers may change without notice. ![]() As you can see below, the CMOS battery on our secondary PC is a CR2032 unit. Most newer motherboard models use a CR2032 battery, but there’s a chance your board uses a different type. Once you locate the CMOS battery, take a photo of it to find out its type. Step 4: Take a Photo of the Battery to Find Out Its Type In most cases, this isn’t needed, but on some motherboards, the GPU can obstruct access to the CMOS battery. If you have a graphics card installed, especially a long and thick high-end GPU, you might have to remove it in order to locate and access the CMOS battery. Step 3 (Optional): Remove the Graphics Card If You Have One Again, look for a round, silver thing on the motherboard’s lower part. If you didn’t find the CMOS battery location with a Google search, now’s the time to search for it. Once you locate your CMOS battery on your motherboard, disconnect every cable hooked to your PC and open the side panel. The CMOS battery is usually located under the primary PCIe slot on modern motherboards MSI Step 2: Disconnect the Cables From Your PC and Open Your PC Case As you can see, the CMOS battery is quite easy to spot. Below you can see the CMOS battery location on a popular B550 motherboard, the MSI B550 Tomahawk. Once you find a photo, look for a round silver thingy, usually located under the main PCIe slot. Step 1: Locate the CMOS Battery on Your Motherboardīefore opening your PC case, try searching for your motherboard photos -if you know what motherboard model you have- online. ![]() All you have to do is open your enclosure, locate the battery, and replace it. How to Replace Your CMOS Battery on a Desktop PCĬMOS battery replacement is a straightforward procedure on a desktop PC. Other signs include your BIOS settings being reset to defaults and seeing the “CMOS Checksum Error” during the boot process. The most common sign of a dying CMOS battery is having to set date and time each time you turn your PC on. If you don’t need to set the date and time and your operating system boots without issues, the battery’s most likely fine.Ĭommon Signs That Your CMOS Battery is Dying In the morning, connect the PSU cable and turn on the PC. ![]() Just flip the PSU switch from 1 to 0, unplug the PSU cable, and leave the PC unplugged. There’s a simpler (if less immediate) method we recommend: simply unplugging your desktop PC’s PSU cable and leaving it powered off overnight. To do that, though, you’d have to open your PC’s case and remove the battery, and you’d need to own a digital multimeter. Now, the fastest way to test your CMOS battery is by checking its voltage with a digital multimeter. RELATED: How to Check Your BIOS Version and Update it How to Test Your CMOS Battery If that happens, the CMOS memory chip won’t be able to hold your BIOS settings between power cycles, resulting in a reset, which can be very frustrating. The CMOS keeps those BIOS or UEFI settings stored in CMOS RAM when your computer doesn’t receive any external power, e.g., when the PSU is disconnected.Īll batteries degrade over time, though, and your CMOS battery may die before you’re through with your motherboard. The CMOS (Complementary Metal-Oxide-Semiconductor) battery on your computer’s motherboard acts as an emergency power for the BIOS and date and time settings. Here’s how to test your CMOS battery and replace it if needed. To replace the CMOS battery, locate the battery on your motherboard, press the latch holding the battery to pop it out, and install the new one.Īre you worried your PC’s CMOS battery is dead or dying? The good news is that testing it, even without special equipment, is easy, and so is swapping it out. If your BIOS is reset in the morning, you need a battery change. To test your CMOS battery leave your PC's PSU off and unplugged overnight.
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