05-31-2017 07:37 AM
Hi guys, I just want to post an issue that I'm experiencing for your reference.
My P50 machine is docked and connected with an external display. When its bios is upgraded to the latest two version, i.e. version 1.39 or 1.40, it cannot be started up properly at docking condition. The external display is dark, while the LCD display seems stuck at "LENOVO" screen. I am unable to access the bios mode at that time. However, when I undock the machine, it begins to start up and ultimately enters Windows. Then I dock it back, everything works well. I restart the machine and it can also start up properly to Windows. But if I try a "cold" startup, the issue comes back.
Now I downgrade the machine to bios version 1.38 and everything works fine. I figure that there could be something wrong with the latest two version of bios. If you want to upgrade your bios and you have the similar configuration as I have, please be aware that you might experience the issue.
Solved! Go to Solution.
05-31-2017 08:11 AM
I don't have a P50, but it would help someone who does to know how the external display is connected
06-01-2017 06:22 AM
Have you verified the dock has its own latest firmware installed? It can be found at https://support.lenovo.com/us/en/solutions/acc100247.
06-01-2017 07:43 AM
Thank you for your help. You method works. I didn't know exact FW version of my dock, but I tried to update it anyway. And after that I upgraded the bios of my P50 to version 1.40. The STARTUP (at docked condition) performs normally now. I've tried the "cold" startup several times and every time it works.