Hi there,
You can try to connect an external monitor to it.
Just to see if the MacBook boots at all.
Try the following sequence:
Make sure that the MacBook is turned off(no keyboard backlight or LCD backlight present)
Connect the external monitor
Connect the charger
Press the power button
Give the MacBook enough time to start.
If the external monitor starts displaying your background image, you might just need a screen replacement.
The external monitor might turn on and just display a black screen. If that's the case, try to move the cursor around to make it go to the monitor.
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