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Electronic card or burned motherboard
Sony Xperia X is overheated and the card or motherboard is burned and it no longer lights up ... where do I buy another board?
Tarjeta electronica o placa base quemada
Sony experia X se recalento y se quemo la tarjeta o placa base y ya no enciende más...donde compro otra placa?
I've edited your post as this is an English only forum, you can use Google Translate to reply and/or post.
It'll be really hard or even impossible to know if there's any physitical damage to your device, you should get it inspected by your Local support before you use it again.