Hello , sorry about your problems. My name is Marco and I will do my best to help you.
1.
Perform a Hard Reset:
-Disconnect the charger and any other peripherals.
-Since the battery is already removed, press and hold the power button for about 30 seconds to drain any residual power.
-Reconnect the charger and try to turn on the laptop.
2.
Ensure the AC adapter is functioning correctly. Although it charges your phone via USB, it's possible it's not delivering the correct voltage to the laptop. Try using a different Dell-compatible charger if available.
3.
There are advanced Troubleshooting you can try:
If accessible, try disconnecting the CMOS battery for a few minutes and then reconnect it. This can sometimes resolve hardware issues that prevent booting.
Tuto here: https://www.youtube.com/watch?v=zCkfei-22ic
4.
Connect an external monitor to the laptop to check if the issue is related to the display. If the external monitor works, the laptop's screen might be the problem.
5.
Consider taking the laptop to a professional to check the motherboard and other internal components. Power surges during outages can damage sensitive electronics.
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