Acer e1 571 bios problem

[Shannon1323]

hey guys, I have a acer aspire e1-571, and upgraded my bios to v2.21, everything went successful, except if I try to boot my laptop it just shows a black screen, everything else powers on for a few seconds then shuts down again, now when I want to boot it I have to remove my ram stick and boot it without ram, then insert the ram and reboot then everything works fine, but it's quite a process to turn on my laptop, any help would be appreciated

 

[webworkings]

You may want to try pulling the CMOS for a few minutes, to restore the BIOS.

 

[Shannon1323]

That was the first thing I tried with no luck

 

[webworkings]

You got me on this one then. Perhaps there is someone else who has a suggestion.