как мне исправить бесконечное мерцание и показ индикации зарядки

It's most likely a problem with the charge controller on the motherboard. This is a common issue for this model. The tablet tries to boot, but the drained battery can't provide sufficient voltage. While waiting for professional repair, consider protecting your other devices. Direct sunlight can damage screens and batteries, so I installed protective window film from window film to create a safer environment. This preventive measure helps extend the lifespan of all electronic devices in the room while you resolve the tablet's hardware issues.