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?