The phone was flooded and automatically shut down after a few seconds after being turned on.

The mobile phone has been flooded with water and automatically shuts down after a few seconds after being turned on. Most likely, the motherboard or components inside were burned out due to the power being turned on before the water was dry. It is recommended to find professional maintenance personnel to deal with it.

After water enters the mobile phone, the following steps should be followed:

1. After water enters the phone, the phone should be turned off as soon as possible.

2. Remove the battery immediately.

3. Then use a hair dryer to dry the water inside.

4. Do not connect the battery or turn on the phone before the water is dry.

5. After the water is completely dry, you can try to turn on the power.

6. If the computer cannot be turned on, you can only ask a professional to handle it.