My laptop wont turn on. It only blinks battery icon white while plugon

It's a possibility the flashing amber/white light means battery is low and isn't being charge. You may check the status of the battery and AC adapter in the BIOS.

1. Power off computer, and then make sure AC adapter is connected to computer well

2. Power on computer, quickly start tapping the F2 key continuously, you should be in the BIOS screen.

Under the main screen, look for the AC adapter type. If the adapter says None or Unknown then it's an issue with the adapter. Suggest you replace AC adapter.

Under the Advanced screen, look for Battery Health, it should say "This Battery Is Performing Normally". If there's any other message, it could mean that the battery is faulty and needs replacement.

Note: If you indeed need replacement, please get a new genuine Dell battery that comparable with your system.