One day, I left my laptop turned on on the table and when I came back the other day, I wasn't able to turn it on.
When I press a start button, nothing happens. The screen is black, the white led diode does not light up and the fan is not spinning either. I tried a full power refresh but it didn't help.
I do not know what to do, can you help me please?
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@ondrejknizek start with a few basics. First you want to check your power supply. Make sure it has the proper voltages. Check to make sure that connectors are not bend etc. Check the DC-in jack of your laptop. Make sure there is no corrosion, debris etc. that prevents it from working. Clean it of any debris etc, use a few puffs of air to clean it out. If none of this works, get a ammeter and see if your laptop draws any amperage from the charger. After that, you need to check and see if your motherboard even gets power. For that of course, you need to open it up. Post Some good pictures of what you see. That way we can see what you see.
Use the HP EliteBook 840 G3 Maintenance And Service Guide to work on it.
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