At first start, 3 long bips + 2 short with  LED blinking red, meaning proc missing or damaged. I check the proc, was in place but the contacts underneath were full of conductive grease. Random Access Memory not the same as my previous computer (same model as ordered). after 2 hours of checking and finally a start, the screen shut off after a while many times, meaning the graphic card is dead. Same symptom as my computer and that why I needed to buy an external graphic card.