Lenovo ThinkPad E580 powers on, no display, then turns off.

[Arty30]

Hello, I have a Lenovo ThinkPad E580 That is non-functioning. I got it for almost nothing because it had a corrosion issue. I replaced a peripheral board that had damaged ports. I believe it was stone dead since it had been sitting a while. I cleaned it up as best as I could, but when it comes to testing I did not make it very far. It finished charging, and when I press the power button the power LED and all the num lock/scroll lock/ fn lock lights come on for about 20 seconds, and then it powers off. I hear the fan running while it does this, and when I shine a light on the screen I see it get darker as if it's displaying a "black" screen but nothing more. perhaps the backlight is dead, but I'm not sure that would make it shut down after about 30 seconds. I haven't tried anything yet I just want to hear if anyone has any tips. I wouldn't be too surprised if it's junk.

[amyk]

You can check for activity on the BIOS pins to see if the CPU is reading from it.

Schematic seems to be available under reference ID "NM-B421".

[Arty30]

OK so I reseated all the cables I could get to and moved the RAM to the other slot and now it seems to work. Windows seems to be acting weird so I'm just going to reinstall windows.