I bought a used laptop FB Marketplace and it worked for 3 days and all of a sudden it doesn't turn on. I thought it was the battery so I removed it and plug in the charger but still doesn't turn on. On top of that I noticed that when I press and hold the power button. I see the green power light flicker just once. Can anyone help me out?
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That single flicker suggests the laptop is getting some power but failing to start. Try a hard reset with the charger disconnected, then reconnect the charger and test again. If it still only flickers once, I’d suspect the charger/DC-in circuit, motherboard power circuitry, or a shorted component rather than the battery.
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@andrewortiz the single green flicker means the charging controller is attempting to turn the laptop on but immediately detects a short circuit or power rail failure and shuts down to protect the board. First, disconnect the main battery and the charger. Locate the small coin-cell CMOS battery on the motherboard, unplug it for about ten minutes to completely drain the volatile memory. After that plug only the charger back in to see if a corrupted BIOS was blocking the boot sequence.
If the CMOS reset fails, a shorted peripheral might be the issue. Strip the board down to the bare minimum by removing the RAM sticks, the NVMe SSD, and the Wi-Fi card. Plug the charger in and try to power it on. If the laptop stays powered on and the fans spin, reinstall the components one by one to identify which one is shortening out your system.
If the board still only flickers with all peripherals removed, you have a short circuit on the logic board itself. You would have to check for a short to ground on the main 19V rail and the primary 3.3V and 5V inductors. A blown MOSFET or shorted capacitor in the GPU or CPU voltage regulation rails is common and could be causing your issues.
We will need to see your motherboard nad need to know the exact model for it. That way we can check for schematics to help you out further if needed. Adding images to an existing question
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When you say you it "worked for 3 days" do that mean you've only had the laptop for 3 days? If yes you should be able to return the laptop.
by Albert Einstein
Sorry for not giving all the details but it is a used laptop in FB martket
by Andrew Ortiz
@andrewortiz
Does the laptop indicate that the battery is being charged when the charger is connected?
by jayeff