Hp omen 15-dh1005na not starting

[Irfan-1]

Hiya i have HP Omen 15-dh1005na and i was having a problem to start up, there was power light and was started up with a black screen only,

After trying this a few times all of a sudden the power light has completely stopped working and the laptop stopped to switch on aswell,

I have used the multimeter and i can see the voltage on the charger 19.5v, after connecting the charger to the laptop i see the voltage on the port and the red wire aswell of 19.5v which shows the voltage is going through, when i tried to test my bios i see 0 voltage along with the cpu and gpu all 0 voltage,

I really don't know what to try now, if anyone can help me get this working again i will be grateful 

Thank you

[Raj_05]

Hi @Irfan-1,

Welcome to HP Support Community.

Thank you for posting your query, I will be glad to help you.

It sounds like your HP Omen 15 is facing hardware-level issues, potentially related to the power delivery or motherboard components. Based on your observations, here are some steps and insights to help diagnose and potentially resolve the issue.

Hard Reset the Laptop:

• Disconnect the charger.
• Remove the battery (if possible).
• Press and hold the power button for 30-60 seconds to discharge any residual power.
• Reconnect the charger (without the battery if removable) and try powering it on.

Check for Any Indicator Lights or Sounds:

• Look for any faint lights, keyboard backlighting, or sounds (e.g., fan spinning or beeping).
• A sequence of beeps or lights can indicate a diagnostic error code.

Inspect the Charger and Power Jack:

• Although you measured voltage on the charger, ensure that the charger is delivering adequate current as well. Voltage may read correctly even if the charger cannot provide sufficient amperage.
• Check the DC jack on the laptop for looseness or damage. If it feels loose, it may not be supplying power properly.

BIOS Recovery:

• Some HP laptops support a BIOS recovery procedure:
  • Turn off the laptop.
  • Press and hold Win + B, then press the power button for 2-3 seconds, continuing to hold Win + B for an additional 10-15 seconds.
  • If this works, the laptop may enter a BIOS recovery mode.

Test with External Display:

• To rule out a display issue, connect an external monitor via HDMI or DisplayPort to see if the laptop outputs any image.

Check the Motherboard for Visible Damage:

• Open the laptop and inspect the motherboard for any visible signs of damage, such as burnt components, bulging capacitors, or discoloration.
• Ensure all connections, such as RAM, SSD, and CPU, are firmly seated.

[Raj_05]

RAM Reseat/Test:

• Remove the RAM sticks, clean the contacts gently, and reseat them.
• If you have multiple sticks, try booting with only one at a time to rule out a faulty module.

Reset CMOS Battery:

• Disconnect the CMOS battery on the motherboard for a few minutes, then reconnect it. This will reset the BIOS settings.

Observations Based on Your Voltage Measurements

• If the charger and port are delivering 19.5V, power is reaching the laptop.
• The absence of voltage at the BIOS, CPU, and GPU suggests that:
  • There may be an issue with the power management circuit or voltage regulators (VRMs) on the motherboard.

I hope this helps.

Take care and have a good day.

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

Alden4

HP Support 

[Irfan-1]

Hello thank you for your reply, 

Yes i have tried the RAM but no chnages, i don't seen to have a CMOS battery on my motherboard, 

I just don't understand where the19.5v is going?

[Irfan-1]

Hiya

Yes i have tried the hard reset but no luck 

I had a look again but no led light, no screen light, no back light on the keyboard, no fan and no voice of any beeps,

Yes i tried both bios and external screen but no luck, the laptop did not open in anyway,

I can try checking the adequate current as you said it might show the right about of voltage but might not the adequate current, can you explain to me how i check that adequate current?

Thank you

[Raj_05]

Hi @Irfan-1,

Thank you for your response, 

Since you've tried many standard troubleshooting steps, let's delve into some more advanced techniques.

Measure Adequate Current Flow

• Even though voltage reads correctly (19.5V), insufficient current might prevent components from powering up.
• Use a multimeter with a current measurement function:
  1. Connect the multimeter in series with the charger to measure current draw.
  2. Compare the reading to the laptop's expected current draw (usually mentioned on the charger; e.g., 3.33A for a 65W adapter).
  3. If the current is abnormally low, the power management IC (PMIC) or other components on the motherboard might be faulty.

Inspect the Power Circuitry

• Check for power beyond the DC input jack:
  1. Use a multimeter to measure voltage at the following points:
     • Battery terminals (if internal)
     • Power Management IC (near the power jack or battery connector)
     • Voltage regulators near the CPU/GPU
  2. If you detect power loss along the line, the faulty regulator or IC might need replacement.
• Common culprits include MOSFETs, capacitors, or diodes in the power circuit.

Thermal Camera or Temperature Check

• Use a thermal camera or IR thermometer to detect overheating components when you try to power on.
• A shorted component (e.g., MOSFET or capacitor) may heat up significantly.

Inspect for Short Circuits

• Test the motherboard for shorts:
  1. Set your multimeter to continuity mode.
  2. Check between ground and power rails (e.g., 19.5V line).
  3. A continuous beep indicates a short circuit that needs to be isolated.

Test Power Button Circuit

• Verify if the power button is functional:
  • Measure the voltage across the power button pins when pressed. If no voltage change is detected, the button or its connection might be faulty.

[Raj_05]

Reprogram BIOS or EC

• Corrupt BIOS or embedded controller (EC) firmware can prevent the laptop from starting.
• Steps:
  1. Download the latest BIOS/EC firmware from HP's support site.
  2. Use a USB flash drive to attempt recovery following HP's BIOS recovery steps (Win + B or ESC key with power).

Remove Peripherals and Test

• Disconnect all non-essential components, including:
  • SSD/HDD
  • Wi-Fi card
  • Keyboard/trackpad
• Attempt to power on with only the motherboard, CPU, RAM, and display attached.

Perform a Deep Inspection

• Look for:
  • Burn marks or discoloration on components
  • Cracked solder joints (reflowing may help)
  • Swollen capacitors (these need replacement)
• Pay close attention to the VRMs, DC jack area, and PMIC.

I hope this helps.

Take care and have a good day.

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

Alden4

HP Support 

[Irfan-1]

Thank you i think i will try to reprogram my BIOS as you said and see what happens

[Raj_05]

Hi @Irfan-1,

Thank you for your response, 

Please feel free to reach out to us. We are here to assist you and provide any necessary support.

I will be archiving this case for now however, you can respond to the same thread to continue the conversation.

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

Take care and have a great day ahead!

Alden4

HP Support 

[Irfan-1]

I was checking on different chips for the voltage but on one chip i saw a spark, can you have a look what that chip is? I don't understand why it blow up the corner lead when i was just checking the voltage?