lenovo problem with starting

[waleddiap2015]

hi guys
i have lenovo Y480 idea pad
my labtop keep restarting immeditaly when lenovo logo appear in the screen thats mean 3 seconds from pressing power i try every thing to inter boot or bios and failed
f2 or f12 dosnt work even the bios key which beside the power botton dosnt work too
any thing i can do ??

 

[CountMike]

Try without battery, only power supply.

 

[waleddiap2015]

Thanks for ur reply
I try every thing without battery I try remove memory and Clean it and try by one memory it’s the same thing

 

[waleddiap2015]

MERGED QUESTION
Question from waleddiap2015 : "lenovo problem with starting"

Hello guys

I have Lenovo Ideapad Y480

the problem started like that :

1-i was making normal restart to inter boot list of my laptop

2- I forget to press f12 so I press power to make laptop shut down

3- I press power again it starts normally it shows me 2 options the first: to complete to windows normally the second: was delete restoration data and proceed to system boot menu I choose the second one and press enter the lab restarts and the problem begins

the problem is when lab start it shows Lenovo logo immediately its restart again I try f2 or f12 doesn't response try everything doesn't respond even novo button doesn't response try to remove memory clean it and put it again same issues I cant inter boot by anyway its just restarts immediately when Lenovo logo appears on screen