"Micro Soldering Bottom Board iPhone X" to "Micro Soldering Bottom Board iPhone X iPhone X Logic Board Problem Symptoms • No touch even after a new screen • Boot loop • No power • No wifi • No service iPhone X Logic Board Repair The iPhone X logic board is a whole new animal. All of the iPhone logic boards prior to the iPhone X were one piece. The bottom logic board contains the logic for the touch system, wifi, and cell service."