how to check dead laptop motherboard  

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How to check dead laptop motherboard step by step
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Checking a dead laptop motherboard involves a systematic approach to diagnose the issue. Here are steps you can follow:
1. *Power Supply Check:*
Ensure the laptop is plugged into a working power outlet.
Check the power adapter for any signs of damage or malfunction.
2. *Indicator Lights:*
Look for any indicator lights that show the laptop is receiving power when it's plugged in.
These lights are usually near the power button or on the laptop's edge.
3. *Battery Check:*
If the laptop has a removable battery, try removing it and powering the laptop using only the AC adapter.
If the laptop doesn't turn on with the battery removed and only connected to AC power, the issue might be with the power adapter or the motherboard's power circuit.
4. *External Display Test:*
Connect the laptop to an external monitor using the appropriate video output (VGA, HDMI, DisplayPort, etc.).
Power on the laptop and check if the external monitor displays anything.
If the external monitor shows a display, the issue might be with the laptop's screen or its connection to the motherboard.
5. *Check for Signs of Life:*
Listen for any sounds like fans spinning or hard drive activity when you attempt to power on the laptop.
Any audible signs can help diagnose whether the motherboard is receiving power and attempting to start up.
6. *Physical Inspection:*
Visually inspect the motherboard for any signs of physical damage such as burnt components, bulging capacitors, or loose connections.
Check for any liquid spills or corrosion that might affect the motherboard's functionality.
7. *BIOS/CMOS Reset:*
In some cases, resetting the BIOS or CMOS settings can resolve startup issues caused by incorrect settings. Refer to your laptop's manual for instructions on how to perform a BIOS reset.
8. *Professional Help:*
If you are unsure or uncomfortable performing these checks, consider seeking assistance from a professional technician or the laptop's manufacturer service center.
By systematically going through these steps, you can often pinpoint whether the issue lies with the motherboard itself or with another component like the power supply or display.