An awesome student from our education program made this wiki. It is not managed by iFixit staff.
ASUS ROG G751JL-BB17T29 Troubleshooting
The ASUS ROG G751JL-BB17T29 is a 17 inch gaming laptop produced in 2014 by ASUSTeK Computer Incorporated. Although this laptop was originally sold with Windows 8.1, all troubleshooting guides will be written for Windows 10 due to most retailers currently selling the G751JL with this newer version of Windows pre-installed. If compatibility issues do arise, there is an option for a free upgrade to Windows 10 that will fix them.
- Computer Will Not Power On
- Keyboard/Keys Not Responding
- Computer Won't Boot
- Audio is Distorted
- Failure to Read CD's and DVD's
- No Image Displayed
Computer Will Not Power On ¶
Computer does not power on when you press the power button.
Faulty Power Adapter ¶
There are several indicators of a faulty power adapter. First, check the indicator light that is located on the power adapter. If the light does not turn on when the computer is plugged in, try a different power outlet. If the light still does not turn on, then you may need to replace the power adapter.
If the indicator light does turn on but the computer is still not powering on, test the power adapter with a multimeter. The reading should be approximately 19.5V with the positive lead inside the round female power socket and the negative lead on the external metal portion on the socket body. Otherwise, the power adapter may need to be replaced.
Faulty Battery ¶
If the computer has poor battery life or powers off immediately after being disconnected, the issue may be a faulty battery.
The easiest way to identify issues with a faulty battery is by performing a visual inspection of the battery. In many cases, a swollen battery is a sign that the battery is worn or damaged and needs to be replaced. However, if no apparent damage is obvious, it is also a good idea to check if the battery is overheating. In either case, a battery replacement will be necessary with this guide.
Keyboard/Keys Not Responding ¶
Keyboard does not respond or keys may be broken or missing.
Missing or outdated drivers ¶
For the computer to boot properly the BIOS will need to detect a functional keyboard. If the laptop does not detect the built in keyboard the BIOS may alert the user with several beeps. In this, case a stand alone or external USB keyboard can be used to attempt to reinstall the drivers. This can be done at this site.
If the reinstallation of the drivers does not resolve the issue, then the keyboard may need to be replaced with this guide. Before replacing the laptop's keyboard you should check if the computer is registering it in the Device Manager.
To navigate to the Device Manager, click the start menu bar and, using the external keyboard, input the text Device Manager which uses the built in search function. This will locate any program you may wish to locate quickly. Once you've opened the Device Manager there should be a tab titled Keyboard. If a device shows up, make sure your drivers are up to date. If the device shows and your drivers are updated, the problem is most likely going to be in the keyboard's hardware.
Faulty Keyboard ¶
A keyboard that is not responding may be either hardware or software related. If the keyboard can be seen in the Device Manager and the drivers are properly installed and updated, then it is a hardware issue. A faulty keyboard may be the issue and it may have to be replaced with this guide.
Keys Are Stuck In Place ¶
The most common symptom of a stuck key is when the BIOS notification beeps on startup. If the computer is able to boot, then test each individual key using a word processing program to find the stuck key. Then simply remove, clean, and replace the stuck key.
If the computer is not able to boot due to the stuck key, attempt to press down each key. If one of the keys does not depress properly, that key will need to be removed, cleaned, and replaced. If you are unable to find the faulty key, then disconnect the keyboard and use a USB keyboard to reboot the computer. If the computer is able to load windows with the USB keyboard, then the first keyboard was faulty. Remove and replace the keyboard with this guide.
Keys Are Missing ¶
If there are broken or missing keys, then replace those keys or the entire keyboard by using this guide.
Computer Won't Boot ¶
Computer does not boot Windows when powered on.
RAM error ¶
RAM is one of the most essential components of a computer. Because of this, if the RAM is not functioning properly then the computer may not boot.
In the case of bad RAM you may hear several BIOS beeps; this is a beep sound that happens during the boot of the system while trying to power on your computer. If the computer does not load windows after the BIOS beeps then it is a good indication that you have bad RAM. First, check to see if the keyboard is faulty using our keyboard troubleshooting guide. If the keyboard is not faulty, then replace the RAM with this guide and reboot the computer. If Windows is able to boot, then the RAM was faulty and needed to be replaced. Otherwise, the issue lays in another component.
If the computer is able to load Windows, but the computer is very slow once it does, then you should check task manager to ensure the correct amount of RAM is available to the computer.
It is also a good idea to test the RAM itself. This can be done by typing CMD into the Start menu and then running mdsched.exe. Once the computer restarts, windows will check for system memory issues and let you know definitively if the issue with sluggish performance is or is not related to the RAM.
Hard Drive Error ¶
Clicking or grinding while booting is the most common symptom for a failing hard drive. In many cases the computer may still boot, but the hard drive may fail soon. Therefore, it is highly recommended that the computer should be backed up as soon as possible. The hard drive should be replaced using this guide.
If, however, the computer does not boot at all, then it is possible that the hard drive has already failed. This can be verified by accessing the system BIOS by pressing the F2 key while the computer is booting. If the hard drive does not appear in BIOS, then it will need to be replaced with this guide.
Audio is Distorted ¶
You have issues with sounds on your computer.
Missing or outdated drivers ¶
If the sound from either the speakers or headphones are not working, then it is a good idea to check and see if the audio drivers are installed and up to date. The current drivers can be found at this site.
Broken speakers ¶
Broken speakers may still produce sound, but it may be crackly or sound distorted. This is sometimes described as mechanical or robotic noises. In this case, the speaker may need to be replaced. If there is no sound at all coming from the speakers, then first test the headphone jack and verify that that the drivers for the audio are properly installed and updated. If the drivers are installed, updated, and the headphone jack is functioning properly, then the speakers will need to be replaced with this guide.
Failure to Read CD's and DVD's ¶
Computer won't read CD's and DVDs or the optical drive won't open.
Broken/Defective Optical Drive ¶
If the optical drive does not open with the eject key on the computer, attempt to manually open it using the pinhole on the right side of the optical drive. If the drive still does not open then it is possible a disk is jammed in the optical drive and, unless it can be dislodged, the drive will need to be replaced with this guide.
If the optical drive does not appear at all in the device manager and you have already installed the correct drivers, then replace the optical drive with this guide.
If the optical drive is updated and the driver slot can be opened but still does not read any disks, then the optical drive will need to be replaced with this guide.
Missing or Outdated Drivers ¶
If the drive does open with the pinhole, then check to see if the computer is properly registering the optical drive in the device manager. If it is, check to see if the drivers are installed and updated. This can be done at this site.
No Image Displayed ¶
The monitor is dark or no image is displayed.
Dark or Dim Image ¶
A dark screen could be a sign of the brightness level on the computer is set too low or that the backlight of the monitor may have gone out.
If the computer boots at a normal brightness, but then immediately dims, then the brightness setting is too low.
However, if during the boot process the screen is dim and remains dim, then the backlight on the LCD may be damaged and the LCD will need to be replaced with this guide.
No Image Displayed ¶
If there is no image on the screen, there is a possibility that the setting for the display is set incorrectly. Boot the computer into the BIOS by using the F2 key during the boot process. If the computer’s display works fine in the BIOS screen, then it is only the setting for the display that needs to be changed. Depending on which settings need to be adjusted, different steps will need to be taken to resolve the issue. The manual with these steps can be found at this site.
However, if even in the system BIOS there is nothing displayed on the screen, then the LCD may be malfunctioning and will need to be replaced with this guide.
Cracked or Broken Screen ¶
If there is apparent damage to the screen, such as watermarks, cracks or a bleeding LCD, then the screen will need to be replaced with this guide.