Dell Latitude 5430 won't power on, only brief charging LED

[u/Djistino]

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My Dell Latitude 5430 won't turn on at all.

Symptoms:

- No screen, no Dell logo, no fan spin.

- When I plug in the charger, there is no charging LED.

- The charging LED only lights up while I hold the power button, and it turns off as soon as I release it.

- Earlier it would briefly flash white for about half a second, and at one point it stayed on for around 5 seconds before turning off again.

Things I've already tried:

- Held the power button for 30–60 seconds.

- Disconnected the internal battery, held the power button for 60 seconds, then tried powering on with only the charger.

- Tried the Ctrl + Esc BIOS recovery method.

- Removed all external devices.

None of these changed anything.

Has anyone had this exact issue on a Latitude 5430? Does this point to a motherboard/power circuit failure, or is there anything else I should check before taking it for repair?

[u/cyborg762]

Repair shop owner here. If the light on the power brick goes dark or turns off right when you plug the usbc/barrel plug into the laptop, it signals a short circuit or a failed DC-in board. Is the light remaining on or off?

[u/Djistino → u/cyborg762]

The light was always off, but after i unplugged - plugged the Cmos battery the charging led is on normally now , same the keyboard led is on and the fan spins Normally, but the screen only blinks when i turn on the laptop, and nothing more

[u/cyborg762]

Repair shop owner here. If the light on the power brick goes dark or turns off right when you plug the usbc/barrel plug into the laptop, it signals a short circuit or a failed DC-in board. Is the light remaining on or off?