To get important work completed, you switch off your PC. The PC won’t turn on, but the motherboard light is on. You’re wondering what the issue is and why your computer isn’t working? Let’s go over the issue here in the article.
There are many reasons your PC isn’t working. We’ll look at the typical reasons why your PC does not turn on and potential solutions to solve the issue fast.
Why Won’t PC Turn On, But Motherboard Light is On?
Reasons
There are many reasons your computer will not turn on, and the motherboard light won’t be lit. Let’s look at some of the most common causes.
Power Supply Failure
The PSU or the power supply is responsible for powering all hardware. If the PSU isn’t working properly, the various hardware components may not be able to receive the power they require. This could be the reason for your computer not powering on.
Dead CMOS Batteries
A CMOS battery can be described as a battery connected to your PC’s motherboard. If the CMOS battery is not functioning properly, it could result in issues such as the computer’s power not being turned on; the computer keeps closing down, CMOS checksum error, etc.
Fixtures
Check All The Connections
- The first thing to do if your PC isn’t turning on, but it’s on the motherboard, is verify all connections.
- Start by disconnecting all cables that connect to your computer. Clean the socket and port to get rid of dirt and dust.
- Then connect the cables in the ports. Use firm pressure to ensure it is secure. Repeat this procedure for all cables.
- You can also try switching the cables’ ends.
- If any cables are not properly connected, problems like this could appear.
- The loose cable connections are one of the main causes of your computer not starting up or restarting after a few minutes. Connecting the cables correctly will be able to solve the issue.
Reseat The RAM
Follow the steps below to reset the RAM of your computer:
- Switch off the computer and unplug the power cable.
- Take the side panels off of the cabinet.
- Lift the unlock on the RAM slot to unblock the RAM sticks.
- Clean the slot using a cloth that is free of lint
- Attach the memory sticks back into the slot.
- Close the cabinet’s door
- Connect the cables and turn on the computer.
Blown IC Fuse
The various components of the PSU comprise the IC fuse, which allows the power supply to various connected devices.
Switch off the power source and check if you detect any smell of burning emanating from the power source. If so, it will be a failed IC. Changing the IC to enable the power supply to function again is necessary.
The process of opening and replacing the IC fuse in the power supply may be a bit challenging for you. You can bring it to the closest service center to have it replaced. IC replaced.
Check The CMOS Battery
The CMOS battery, also known as Complementary Metal-Oxide Semiconductor, functions as a real-time clock installed on your motherboard. It is an electronic device powered by batteries that can store crucial data like the time and date and the basic configurations of your hardware and setting.
The CMOS battery will keep the settings for date and time, as well as other crucial settings, on the same level even when you shut off your computer.
If there is no CMOS battery, the computer may fail to start or restart intermittently. Sometimes, the computer will start up; however, the time and date settings will reset each time you reboot it.
The cabinet’s side panel is open, and look for the CMOS battery on the motherboard.
Removing the CMOS battery off the motherboard should be possible by pulling the sides of the battery out of the slot.
Give it a few minutes, and then insert it again. Restart the PC and test if it is working.
If not, purchase a new CMOS battery and then insert it. Place the battery in the slot and gently press the center of the battery to keep it in its place.
Then turn on your computer, which should function if the issue is related to the battery in the CMOS.
Check Power Button
In many instances, it is either the PC’s power switch or the cable that connects to the power button and the electrical headers of your power switch to your motherboard that could be the source of the problem.
There are two methods to fix and isolate the problem. Certain motherboards have a switch inside the motherboard that turns the PC off. However, some motherboards do not include a button to turn the PC on or off.
If the motherboard you use has an off/on the button, remove that power switch wire to the case or cabinet and press that button in the motherboard. Check if it can turn on your PC.
You could employ a metal screwdriver to start the PC if your motherboard doesn’t have a power button. Locate the power switch headers in your motherboard. They will be marked by PWR_SW + or -. You can consult the motherboard user’s manual if you cannot find it. When you have found it, place the metal screwdriver on the two header pins for the power switch. The power switch should be able to start to turn on the PC.
PSU Problems
PSU is accountable for providing electricity to all components that are connected to it. The motherboard hard disk, the graphics card CPU, etc., receive the necessary power via the cable connecting to the power supply.
As long as the LED on the motherboard is switched on, the motherboard receives the power it needs without issue. However, the same may differ for other devices connected to the PSU, including the CPU or hard disk.
The CPU and the hard disk are the two most important components to boot the computer. Open the cabinet’s side panel and reconnect the CPU and hard disk cables directly to the PSU.
Try connecting it to another cable pair to determine whether the cable is damaged.
If the problem isn’t related to cables, the issue could be an issue with it being the PSU itself. If you’ve got an additional power supply, Try connecting the motherboard and the hard disk, graphic card, and processor to check if you can turn on your PC.
Ensure Monitor Is Working Fine
If you observe the CPU fan turning or the motherboard light has activated, and its power light on your cabinet on etc. However, the monitor doesn’t show anything that could result from an issue with the monitor.
You first need to verify and ensure no problem regarding your HDMI cable. In the next step, you must check if there’s any issue with the monitor itself. A damaged monitor is unable to display any information in the display.
If there is an additional screen at home, you can connect it to check if it shows the content.
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