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How to reset motherboard to factory settings?
In many cases, computer will not turn on, a black screen will turn on, or it will automatically restart, which can be resolved by re-inserting computer's internal accessories or connectors. If plugging and unplugging hardware doesn't work, you can finally try to factory reset your motherboard BIOS (commonly referred to as motherboard drain).
The following are three ways to discharge motherboard, you can use one or more of them at same time depending on situation.
How to discharge motherboard Method 1: use BIOS discharge jumper
Most modern motherboards have a BIOS reset jumper to facilitate a user reset. This is most commonly used BIOS reset method. The discharge jumper, as a rule, is three-pin (there is also a two-pin one), and it is located near BIOS battery socket of motherboard, and next to jumper seat there will be a text label like BIOS or CLRTC.
The example below uses a three-pin jumper. In motherboard default state, jumper cap will be connected to pins marked "1" and "2", which can be known as "Normal" from discharge instruction, that is, normal use state. To use this jumper to discharge, first use tweezers or other tools to pry jumper caps out of pins "1" and "2" and then put them on pins marked "2" and "3". from instructions for extracting, you can find out that at this time status is "Clear BIOS", that is, clear BIOS. After a short touch, you can clear all kinds of manual settings in BIOS, and return to default settings when motherboard leaves factory, as shown in picture below:
After resetting BIOS, remove jumper from pins 2 and 3, and then return to original pins 1 and 2. Note that if jumper cap does not return to normal, computer will not start and an alarm will sound.
Note. For a two-pin jumper, you only need to short two pins with a metal object, and motherboard discharge operation can be completed in about 10 seconds.
How to discharge motherboard. Method 2: Remove motherboard battery
I believe that many users have encountered following situation: reset motherboard bios, but reset bios jumper cannot be found on motherboard (such as ASUS motherboard), what should I do? You can. The BIOS powers up battery to achieve purpose of discharging. Since BIOS is powered by BIOS battery, removing battery may turn off BIOS power so that settings in BIOS are cleared.
Locate BIOS battery slot on motherboard, round one is motherboard battery as shown:
Then press buckle on connector to keep power supply battery out of way, at this time BIOS battery will pop out automatically, gently remove battery as shown in picture: (two metal objects on base positive and negative)
Then, power on host computer and start computer, a message will appear on screen that data in BIOS has been cleared (as shown in figure below), and you need to enter BIOS to reset. Thus, it can be proved that BIOS was successfully discharged.
How to discharge motherboard Method 3: Short positive and negative battery connector to discharge motherboard
While method of removing battery to drain BIOS has had some success, it is not a panacea. Bios reset is not possible. In this case, you need to short-circuit positive and negative terminals of battery socket to discharge BIOS.
The BIOS battery socket is divided into positive and negative poles, and purpose of discharging can be achieved by short circuiting them. First, remove BIOS power battery on motherboard, and then use conductive objects (screwdriver, tweezers, etc.) to short positive and negative electrodes on battery socket to cause a short circuit (as shown in figure below). to achieve purpose of resetting BIOS.
Extended Reading: Why can a black screen or boot failure be fixed in some cases by draining motherboard?
Sometimes motherboard is affected by ESD or other factors, which causes errors in motherboard BIOS or its own anti-static protection, resulting in motherboard not turning on or turning on with a black screen. For this kind of failure, we can solve it by reconnecting hardware and factory resetting motherboard BIOS (commonly known as motherboard reset).
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