Elitebook HP 830 G6 won't powering on

[junior454]

Hello,

Yesterday my HP laptop shut down when the battery was at 21%. After that, when I plugged in the charger, I only saw a brief light, and it powered on once but never again. Since then, it shows no signs of life at all.

What I’ve tried so far:

Different power outlets

Two different HP chargers (same result)

Hard reset (hold power button 30–60 seconds)

Removed battery and tried direct AC power

Checked RAM and reseated components

Current symptoms:

No fan spin, no display, no keyboard lights

No charging LED when adapter is connected

Battery was not at 0% when it died (it was 21%)

It seems like either the DC-in board or the motherboard might have failed, but I want to be sure before considering repair or replacement.

Questions:

1. Could this be caused by a dead battery, or does it sound more like the motherboard/DC-in board?

2. Is there a way to confirm if the motherboard is dead without professional tools?

3. Are there any other troubleshooting steps I should try?

Any guidance would be really appreciated.

Thank you!

[Jupitero]

Hello.

Sudden poweroff with no life signs sounds like a short circuit somewhere in laptop, and would prevent powering up the laptop in any way until fixed.

Dead battery should not prevent powering the laptop, and the laptop can be operated without a battery at all.

The laptop can be powered through the barrel connector, USB-C, or via the dock connector when using the HP Ultraslim dock. You wrote about trying two different power supplies. If you only tried the barrel connector or the USB-C connector to power the laptop, try one of the other methods as well.

Check the power supply with multimeter that it provides around 19.5...20 Volts. If it is a USB-C charger, check that you can charge other laptops, phones and such with it.

If you have the capability, remove the system board and inspect it visually on both sides for signs of faulty components, blackened circuits and similar. Fried electronics may also have a telltale smell. A faulty component may not be visibly or smell bad, however.

Try powering on the system board outside the laptop chassis, with memory and wireless modules removed, and nothing except the power supply connected, not keyboard or video. The idea is to test that it powers on. System boards typically have at least one led to show powered status. You can also determine that the laptop is receiving power by attaching the fan to see that it rotates, or by touching the top of CPU and feel it getting warm in just a few seconds. The CPU will overheat after a few seconds due to the missing cooling, and the laptop will automatically turn off. The CPU and heat sink have thermal paste between them. You can just wipe it away.

If you cannot get the system board to power on with a working power supply, the board needs to be replaced.

Refer to the following guide for removing the system board. It also lists all spare part numbers, including the system board options. If you need to replace the system board, the replacement does not have to be identical. You can always have the laptop serviced at your local HP service partner if you're not sure about working with the laptop internals. 

Maintenance and Service Guide HP EliteBook 830 G6 Notebook PC