Hey everyone, I've got a bit of a peculiar issue here. I have a ThinkPad E580 that turns on, keyboard backlight turns on, num lock, caps lock and fn lock leds turn on, display turns on and shows lenovo logo, but the internal keyboard is completele unresponsive. if I try to enter the bios with an external keyboard, I hear the beep and see that it tries, but it crashes when it reaches that stage. This also only works if I take out the wifi card, if I leave the wifi card in, the boot process takes a tiny bit longer, and it turns off before it registers my keypresses.
I have tried reflashing the bios (which is how I got to this stage, originally it wouldn't display anything but a solid dash in the top left) and I have measure the voltage rails, they all seem to be fine. I have noticed that shortly before turning off, the 5v and 3v3 rails dip lower for a second. I have also interfaced with the UART port of the EC/KBC, and it gives me an "EC INIT OK !!!" message, so I am not sure it's the EC.
if I take out the ram, the laptop stays on for a lot longer before it crashes, and when there is no ram inserted, the keyboard seems to be somewhat responsive, as pressing FN will make it repeat the beep codes.
Anyone have any ideas? Thanks in advance!
I have tried reflashing the bios (which is how I got to this stage, originally it wouldn't display anything but a solid dash in the top left) and I have measure the voltage rails, they all seem to be fine. I have noticed that shortly before turning off, the 5v and 3v3 rails dip lower for a second. I have also interfaced with the UART port of the EC/KBC, and it gives me an "EC INIT OK !!!" message, so I am not sure it's the EC.
if I take out the ram, the laptop stays on for a lot longer before it crashes, and when there is no ram inserted, the keyboard seems to be somewhat responsive, as pressing FN will make it repeat the beep codes.
Anyone have any ideas? Thanks in advance!
Comment