Asus error code 99 strikes while updating the Operating System of your device. Generally, this error appears when the motherboard is unable to perform the boot function. The system fails to give an on-time response and it even fails to perform the basic input or output operations. Sometimes, this error message displays due to the wrong BIOS setup. When this problem occurs, your device shows an error message, ‘Asus motherboard error code 99’. So, in this article, we are going to talk about the probable causes and effective solutions for this error. Just go through this article to fix this error quickly and smoothly.

Apparent Causes for Asus Error Code 99

Here, in this section of the article, you will get to know the reasons that are responsible for the occurrence of the issue. Knowing the reasons will help you to troubleshoot the issue easily. So, go through the reasons behind the error:

• The motherboard is unable to perform the boot operation
• Connection problem of HDD
• An incorrect CMOS battery
• The hardware issue
• Invalid BIOS setup
• The damaged MBR
• Incorrect installation of the hard disk drive

Possible Symptoms of Asus Motherboard Error Code 99

While you try to boot the Asus system, sometimes you get stuck with the error code 99. It is nothing but a motherboard failure issue. Moreover, it fails to start the booting action and shows an unexpected error message. Moreover, the system shows another serious message, “No Signal”. As a result, it prevents you to perform the BIOS. Thus, the basic operations of the computer fail to work and the system failure issue appears.

Step by Step Guide to Troubleshoot Asus Error Code 99

When you confront this particular issue, you must seek the proper help to get rid of the error. Here, in the section, we are going to describe some apparent fixes that will surely mitigate the issue immediately. So, take a look at the entire guide.

Method 1: Reset the CMOS

CMOS Settings issue is one of the significant problems behind this issue. Therefore, without performing the CMOS reset process, you won’t be able to fix it. However, CMOS jumper makes it simple to handle and it is a time-saving process to fix the Asus motherboard and other internal issues associated with it. So, read these steps and apply them.

Reset Through the Jumper

It is an easy way to reset the CMOS. To perform this, go through the steps given below:

1. First, Power off your PC.
2. Then, disconnect all the cables from your device and open the System Motherboard.
3. Now, locate the CMOS jumper and remove all three pins from the jumper.
4. After that, move the jumper from 1-2 position to 2-3 position and clear CMOS.
5. Wait for a few minutes and reset again to return to its default position.
6. Now, switch on the System and enter the BIOS screen to reset the Factory Defaults.

Reset Though Battery Method

If you are not able to get the desired result by performing the reset process by the jumper, you need to reset the CMOS through battery disconnected method. So, take a glance in these below guidelines:

1. At first, switch off the system and unplug all the power cords. We suggest that you should wear an anti-static wrist strap to avoid electrostatic discharge damage of the Asus motherboard, CMOS chip or other sensitive components.
2. Then, remove the cover and locate the CMOS coin cell battery.
3. Now, remove it from the system by gently pushing on the retaining clip and popping the battery out.
4. After that, discharge the CMOS chip by leaving the battery out of the system for up to an hour, depending upon the particular chip and motherboard combination.
5. Now, replace the battery and replace the cover on the system.
6. Connect the power cord, and then boot the computer.
7. Now, click on the ‘Save changes’ option if it is prompted by the BIOS for system memory, drives detected, and other Settings.
8. After that, set the date and time if prompted. Or, you can alternately set the date and time when the Operating System finishes loading.

Method 2: Perform the MBR Repair Program

If the MBR (Master Boot Record) is damaged, the Windows booting process gets stuck as it acts as a loader of Operating System. Moreover, the MBR stores all information about the hard drive partition. To perform the MBR repair program, follow these steps carefully:

1. Insert the Windows Bootable Installation Disk into your computer. Now, boot the system and select the language.
2. Click on the option ‘Repair Your Computer’ from the Screen.  
3. Choose Troubleshoot and Command Prompt respectively.
4. In the Command Prompt window, run the following commands:

“bootrec/FixMbr”, “bootrec/FixBoot”, “bootrec/ScanOS”, “Bootrec/RebuildBcd”

1. Then, hit the Enter key after each and every commands to run them individually. Wait for 2-3 minutes to complete each operation.
2. Next, remove the DVD from the disk tray of the system.
3. Now, select ‘Exit’ and hit the Enter key to close the Command Prompt window.
4. Lastly, restart your device and check if the issue still appears or not.

Method 3: Perform the Scan Disk Task

You can get rid of the problem by applying the scan disk operation. To do it, go through the steps mentioned below:

For Windows 7

If you are Windows 7 user, then try the under mentioned steps:

1. At first, double-click on the My Computer option.
2. After that, you need to highlight the local hard drive option and right-click on it.
3. Next, select ‘Properties’.
4. Now, click on the Tools tab and then choose ‘Check Now’ to check the drive.
5. Restart your computer to complete the process.

For Windows 10

If you are Windows 10 users then, follow the steps one by one:

1. Firstly, press and hold the Windows key and W key at the same time from the keyboard.
2. Open the File Explorer option.
3. Now, click on the ‘This PC’ option and choose ‘Devices and Drivers’.
4. Select ‘Properties’ and click on the Check option.
5. When the Error-checking window appears, click on the Scan Driver option.
6. Finally, check if the problem is fixed or not.

Method 4: Install a New Processor

A Central Processing Unit (CPU) works as the heart of an active system. So, a failure of CPU causes a harmful effect on the motherboard. Also, it generates several issues like Asus error code 99. Sometimes, replacement of the motherboard is the best way to avoid the Asus laptop motherboard conflicts. So, the best approach to overcome this annoying issue is to replace the processor with a new one. Follow the steps given below carefully:

1. Firstly, check the Motherboard compatibility with our system and upgrade the processor on your PC.
2. Open the CPU cabinet of your computer and locate the CPU cooler.
3. After that, remove all the cables and blocking components from the cabinet.
4. Detach the CPU Socket Cover and gently lift out the processor without damaging any pin.
5. Now, install a new motherboard if necessary. Place the processor into the socket after gently opening the processor unit.
6. Re-latch the socket cover and apply the thermal paste to the processor.
7. Now, securely place the CPU cooler plug-in all the wires and cables.
8. Close up the cabinet case and switch on the CPU power.
9. Now, power on the device and check whether the system is working properly or not.
   If not, try to reinstall the Operating System and run the PC again.

Method 5: Disconnect Hard Disk Drive

Sometimes, a faulty hard disk drive might cause this Asus motherboard issue. Incorrect installation of the hard drive may create this severe problem. Apart from that, damaged hardware components is another cause of this error message. To do this, follow these simple steps:

1. Disconnect the battery from the system.
2. Also, remove the service door of the Asus device.
3. Now, remove the screws from the cabinet that keeps securing your Hard disk drive.
4. After that, slide the Hard disk drive and disconnect it.
5. Lastly, disconnect all the cables and check the issue.

Method 6: BIOS Setup

After disconnecting the hard disk drive, you can check the time and date of BIOS. Here are some steps to perform BIOS setup.

1. First of all, switch off your computer and hit the F8 button.
2. Then, go to the BIOS section and click on the ‘BIOS Setup’ option.
3. Now, select ‘Troubleshoot’ and hit the Enter key.
4. Restart your device and check if the error persists or not.

Method 7: Check the Motherboard Connection

The last thing is to check all the connection of the Motherboard. Because the wrong connection of the motherboard can cause this error. So, check if the motherboard is connected properly or not. You also need to check all the internal connections. Now, check if the problem is resolved or not.

Wrapping Up

So, this was all about the possible solutions that can help you to fix the problem with Asus error code 99. Hope this article is beneficial for you. If you have any more queries regarding this issue, then leave a comment below.