Repairing beeping Lenovo T440p
Laptop powers on but nothing on screen. This is often because eeprom (Winbond W25Q32FVSIQ, 32Mbit / 4MB, 2.7V - 3.6V, SPI/QPI) loses programming over time and one day laptop will simply no longer boot. At first it will blink some leds on keyboard and turns off. Then it will degrade to just beeping on boot.