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HP Pavilion g6-1125sw Notebook PC support

Computer does not start and the LEDs blink or the computer beeps

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This document pertains to HP and Compaq Notebook computers.
If your computer makes one or two short beeps while starting, and Windows still opens, the computer is indicating normal BIOS startup was successful. If your computer does not start, a more serious hardware issue is likely occurring. Listen for beeps and look at the LEDs (light emitting diodes) near the Num Lock and Caps Lock keys, the battery, and the AC adapter to help determine troubleshooting steps. This support document contains information that can help you learn more about the issue and how to resolve the problem.
Figure 1: Example of blinking LED condition (your computer may look different)
 Image of a notebook computer with lid open and showing animated lights blinking on and off.

First steps when a notebook LED or beep code occurs

An LED or beep code usually means a basic function is unable to start. A basic function might include reading memory, displaying video, or being able to send information to a hard drive. The most common problems that cause LED and beep codes are memory and heat-related failures caused by a build-up of dust in critical cooling areas.
Use the following steps when your computer emits an LED code or beep code:

Step 1: Performing a hard reset or forced reset on a notebook computer

Before you begin, turn the computer over and look for a battery compartment door. If there is no battery compartment, use the steps in the sealed or non-removable battery section.
View a video on performing a hard or forced reset on your HP notebook with removable battery
To perform a hard reset on a computer with a removable battery, use the following steps:
  1. Turn off the computer.
  2. Disconnect the computer from any port replicator or docking station.
  3. Disconnect all external connected peripheral devices such as USB storage devices, external displays, and printers.
  4. Unplug the AC adapter from the computer.
  5. Remove the battery from the battery compartment.
  6. Press and hold down the Power button for about 15 seconds to drain any residual electrical charge from the capacitors that protect the memory.
  7. Insert the battery and plug the AC adapter back into the notebook computer, but do not connect any of the peripheral devices.
  8. Press the Power button to turn on the computer.
  9. If a startup menu opens, use the arrow keys to select Start Windows Normally, and then press the Enter key.
  10. After reconnecting each of the peripheral devices, run Windows Update and HP Support Assistant to update all device drivers.
View a video on performing a hard or forced reset on your HP notebook with a sealed or non-removable battery
Follow these steps to reset a notebook with a sealed or non-removable battery.
NOTE:You should not attempt to remove a sealed battery as doing so can void your warranty.
  1. Turn off the computer.
  2. Disconnect the computer from any port replicator or docking station.
  3. Disconnect all external connected peripheral devices such as USB storage devices, external displays, and printers.
  4. Unplug the AC adapter from the computer.
  5. For most notebooks, press and hold the Power button for 8-10 seconds.
    If your notebook is listed in the table, use the instructions specific to your computer.
    NOTE:The designated button combination varies by model and production date. If your computer is not listed below, see the User Guide for your specific model for the proper button combination.
    Common Model NameTypically Designated Button Combination
    HP Envy 17 2D and 3DPress and hold the Power and the Beats buttons for 8-10 seconds.
    HP Envy 15-3000 seriesPress and hold the Power and the Beats buttons for 8-10 seconds.
    HP Envy 14 SPECTREPress and hold the Power and the Mute buttons (on the right side of the palm rest) for 8-10 seconds.
  6. Plug the AC adapter back into the notebook computer, but do not connect any of the peripheral devices.
  7. Press the Power button to turn on the computer.
  8. If a startup menu opens, use the arrow keys to select Start Windows Normally, and then press the Enter key.
  9. After reconnecting each of the peripheral devices, run Windows Update and HP Support Assistant to update all device drivers.

Step 2: Removing dust from the cooling areas in a notebook

Over time, dust can collect in the cooling vents of your computer. Too much dust can block airflow, causing sensitive components to overheat and fail. Before troubleshooting startup codes, it is important to remove any dust that may have accumulated.
While wearing eye protection, use canned air to blow out vents, preferably outdoors.
Figure 2: Blowing dust from air vents
Air cleaner nozzle over side vent
After cleaning the computer's air vents, restart the computer.
If the computer starts normally, you are done. Otherwise, proceed to the next step.

Step 3: Writing down the LED or beep code

Use the following steps to write down the LED or beep codes onto a piece of paper.
  1. Press the Power button to turn on the computer.
  2. Your computer's power socket or power adapter may have an LED. If it has an LED, look at the light next to the power socket or the light on the AC power adapter and note its condition: off, blinking, or constantly on.
  3. Look at the indicator lights near the Caps Lock and Num Lock keys and note their condition. If the lights blink, count the number of times they blink between pauses.
    NOTE:After a sequence of blinks or beeps, there is a pause for a few seconds, and the sequence is repeated (usually 3 or 4 times). The blink sequence can be repeated by pressing the Power button.
  4. Listen to your computer for any loud beeping noises. If your computer makes a beeping noise, note the type and number of beeps between pauses. For example: two long beeps followed by one short beep.
  5. On a piece of paper, write down what you have noted to remember the LED or beep code. Then proceed to the next section.

Notebook battery power LED blinks

The Battery power LED indicates the condition of the power supply. When starting the computer, or when the computer is in operation, use the chart to identify the power condition.
The battery power LED is generally a lightning bolt icon. (If the notebook does not have the lightning bolt battery power LED, consult the product manual.)
Battery Power LEDComponent TestedError Condition
Battery power LED off, and Caps Lock/Num Lock offBattery or AC AdapterAC adapter not connected or failure

Battery low charge or failure
Battery power LED blinking BatteryInsufficient charge on the battery
Refer to one of the following sections for more information about the battery power status:
If the battery power LED and the LEDs near the Num Lock and Caps Lock keys do not glow when the computer is disconnected from the AC adapter, then the battery has a very low charge or is not charged at all. Try the following two procedures for diagnosing the power issue:

Charge the Battery:

  1. Connect the AC power adapter, and verify that the battery power LED glows.
  2. Allow the battery to charge for 15 - 30 minutes.
  3. Attempt to start the computer.
    • If the computer does not start, if possible, connect a replacement battery to verify that the battery is the problem.

Check the AC Adapter:

  1. If the computer does not start after charging the battery, remove the battery and connect the AC power supply to the notebook.
  2. Verify that the battery power LED glows, and then attempt to start the computer.
    If the LED still does not glow, either the AC adapter has failed, or there is a bad connection between the adapter and the system board.
    If possible, connect a different AC power adapter to verify that the adapter is the problem, or contact HP for support.
When the computer is on battery power only and the AC adapter is disconnected, if the Battery Power and Caps Lock / Number Lock LEDs do not glow, there is either a very low change or no charge in the battery. Connect the AC power adapter, verify that the battery power LED glows, allow the battery to charge for 15 - 30 minutes and then attempt to start the computer. If it starts, run the battery test and calibrate the battery. If it does not start, if possible, connect a replacement battery to verify that the battery is the problem.
If the computer does not start after charging the battery, remove the battery and connect the AC power supply. Verify that the battery power LED glows, and then attempt to start the computer. If the LED still does not glow, either the AC adapter has failed, or there is a bad connection between the adapter and the system board. If possible, connect a different AC power adapter to verify that the adapter is the problem, or contact HP for support.
If the battery light LED (which looks like a lightning bolt ) flashes, the battery has insufficient charge to start the computer. (If the notebook does not have the lightning bolt battery power LED, consult the product manual.)
  1. Check the AC adapter to confirm that all of the plugs are securely seated.
  2. Connect the notebook to AC power and attempt to start the computer again.
  3. Check the AC adapter to confirm that all of the plugs are securely seated.
  4. If the AC adapter features an LED power indicator, check to see if the AC adapter LED is lit to verify that the computer is receiving power from the wall outlet.
  5. If the computer operates on AC power correctly, charge the battery for thirty minutes to one hour, and then restart the computer.
    NOTE:Charging the battery for this length of time is called "trickle charging". Trickle charging is a continuous constant-current charge at a low rate, which recharges the battery slowly when it is in a deep discharge state. Deep discharge occurs when a battery is left unused for extended periods of time.
When the notebook is used for the first time, the white LED light for the AC power blinks. The battery is still in "shipping mode," when the light continues to blink even when the AC power is connected.
Figure 3: "Shipping mode" blinking LED light
To resolve this issue, turn off the notebook, connect the AC power and allow the battery to charge for at least 30 minutes, and then restart the computer.

LEDs near Caps Lock and Number Lock keys blink when starting the notebook

The notebook diagnostic utilities use the LEDs near the Num Lock and Caps Lock keys to blink a series of error codes ("blink codes"). At the end of the series the blinking stops. Until the error is resolved, the pattern of blinks will occur any time an attempt is made to start the computer.
The LED lights near the Caps Lock and Num Lock keys will blink if an error is detected during the startup process. The LEDs will blink a number of times in a sequence and then stop. The number of blinks in the sequence indicates what component caused an error when it was being tested during start up.
If the LEDs stop blinking and the computer does not start, you can press the Power button again to repeat the tests. After you count the number of blinks, use the chart to identify the error condition, and then see the corresponding section for that error condition below for troubleshooting steps.
NOTE:Knowing the number of blinks is helpful when you contact an HP support agent for technical help.
Caps Lock/Num Lock LEDComponent testedError condition
LEDs blink 1 timeCPUCPU not functional
LEDs blink 2 timesBIOSBIOS corruption failure
LEDs blink 3 timesMemoryModule error not functional
LEDs blink 4 timesGraphicsGraphics controller not functional
LEDs blink 5 timesSystem boardGeneral system board failure
LEDs blink 6 timesBIOSBIOS authentication failure
The computer processor has stopped functioning properly (Blink code 1). Contact HP for assistance.
If a BIOS corruption error occurs (Blink code 2), you may not even notice the blink codes, because as soon as the computer recognizes the error, it restarts, attempts to recover the BIOS, and then restarts again. You may notice an extra-long startup process as a result, and a message indicating that the BIOS has been recovered may display on startup. If this occurs, update the BIOS on the computer. For more information, see Updating the BIOS .
If the computer does not automatically recover the BIOS, manually perform a BIOS recovery by following these steps:
  1. Turn off the computer.
  2. Plug the notebook into power using the power adapter.
  3. While the computer is still off:
    1. Press and hold the Windows key and the B key at the same time, and then press and hold down the Power button on the notebook for one second.
    2. Release the Power button and the keys.
By following these steps the BIOS will reach the EFI partition in order to recover the BIOS to the last known good version of the BIOS from the hard drive.
For information on how to restore the BIOS refer to the HP support document: HP Notebook PCs - Restoring the BIOS .
If you experience a memory failure (Blink code 3), follow the guide in the table below.
If Using Original MemoryIf New Memory Is Added
Reseat the memory.

If reseating the memory does not resolve the problem, try replacing the memory with new memory.
Reseat the memory.

If you continue to experience this error code after reseating the memory, the problem may be with the memory itself. Take the new memory out of the computer, put the original memory back into the computer, and then retest it.
A computer retailer can reseat the memory, if you do not feel comfortable reseating the memory yourself.
NOTE:Some memory module errors may allow the computer to start but will then cause the computer to restart and display a blinking error code.

Reseating memory modules in a notebook

If a memory module is loose or is not making good contact with the memory slot, the computer can fail to start. To reseat the memory module, take the memory module out of the memory slot, and then put it back into the slot to make a better connection so the computer can recognize the memory.
The memory module compartment on most notebooks is located on the bottom of the case, however, on some models, the memory compartment is under the keyboard. See your User Guide for the exact location of memory modules on your notebook.
Use the following steps to remove and reseat the memory modules:
NOTE:Removing and reseating memory modules requires the use of tools to partially disassemble the computer. If you do not feel comfortable doing this work yourself, take the computer to an HP authorized service provider for technical service.
  1. Turn off the computer, and then disconnect the power cord.
  2. Remove the cover to access the memory.
    Figure 4: Removing the cover
    Removing the  cover
    Figure 5: Memory module cover (your cover may be different)
    Image of memory module cover detached from the computer and showing retaining screw locations and direction of removal
    1 - Retention screws (2)
    2 - Direction to remove compartment cover
    NOTE:Your computer may look different than the computer in the graphic.
    NOTE:Some computers may not have a cover that provides access to the memory. Have the computer serviced if you cannot access the memory.
  3. Remove all of the memory modules in the computer.
    Figure 6: Removing the RAM
    Pulling out the RAM
  4. Reinsert all memory modules.
    Figure 7: Notch alignment and memory module insertion
    Image of reseating the memory module by aligning the notched edge on the module with the tab in the slot, pressing the module firmly into the slot, and pivoting the top edge of the module downward until it snaps into place
    1 - Notch alignment
    2 - Direction to insert the module
    3 - Direction to seat module
  5. Replace the cover, battery, and power cord.
  6. Turn on the computer.
  7. Perform any tests to verify that the computer can start up and run in the Windows operating system.
    If the computer fails to boot to the Windows desktop after the memory is reseated and the battery is installed, contact HP for support.
If you experience a graphics controller failure (Blink code 4), contact HP for assistance.
A general system board failure (Blink code 5) is the failure of a component not covered by the other LED error codes. Contact HP for assistance.
The BIOS authentication error (Blink code 6) is extremely rare. It is the result of a discrepancy between the BIOS and the hardware that is installed on the computer. This error occurs when the BIOS cannot authenticate signatures from the hardware on the system. The purpose of the BIOS authentication is to be sure that no one has tampered with the BIOS on the computer.
If a BIOS authentication failure occurs, the computer automatically performs a BIOS recovery. If the computer does not automatically recover the BIOS, perform a BIOS recovery manually by pressing all four arrow keys at the same time to cause the BIOS to go to the EFI partition to find and recover the current BIOS. If a manual BIOS recovery is not successful, contact HP for assistance.

Computer makes beeping sounds

The most common cause of a computer beeping upon startup is a loose or bad memory module. Reseat the memory modules to resolve problems with the computer beeping. If this does not resolve the issue, contact HP for assistance.
If a memory module is loose or is not making good contact with the memory slot, the computer can fail to start. To reseat the memory module, take the memory module out of the memory slot and then put it back into the slot to make a better connection so the computer can recognize the memory.
The memory module compartment on most notebooks is located on the bottom of the case, however, on some models, the memory compartment is under the keyboard. See your User Guide for the exact location of memory modules on your notebook.
Use the following steps to remove and reseat the memory modules:
NOTE:Removing and reseating memory modules requires the use of tools to partially disassemble the computer. If you do not feel comfortable doing this work yourself, take the computer to an HP authorized service provider for technical service.
  1. Turn off the computer, and then disconnect the power cord.
  2. Remove the cover to access the memory.
    Figure 8: Removing the cover
    Removing the  cover
    Figure 9: Memory module cover (your cover may be different)
    Image of memory module cover detached from the computer and showing retaining screw locations and direction of removal
    1 - Retention screws (2)
    2 - Direction to remove compartment cover
    NOTE:Your computer may look different than the computer in the graphic.
    NOTE:Some computers may not have a cover that provides access to the memory. Have the computer serviced if you cannot access the memory.
  3. Remove all of the memory modules in the computer.
    Figure 10: Removing the RAM
    Pulling out the RAM
  4. Reinsert all memory modules.
    Figure 11: Notch alignment and memory module insertion
    Image of reseating the memory module by aligning the notched edge on the module with the tab in the slot, pressing the module firmly into the slot, and pivoting the top edge of the module downward until it snaps into place
    1 - Notch alignment
    2 - Direction to insert the module
    3 - Direction to seat module
  5. Replace the cover, battery, and power cord.
  6. Turn on the computer.
  7. Perform any tests to verify that the computer can start up and run in the Windows operating system.
    If the computer fails to boot to the Windows desktop after the memory is reseated and the battery is installed, contact HP for support. See Contacting HP Support for more information.

Contacting HP Support

If you cannot find a troubleshooting solution, contact HP support for further assistance or to have the computer serviced.

See additional support documents