System refuse to come up

It would be helpful if you indicated the EXACT MBP that you have and the current OSX.

Ciao.

On the bottom of the MBP is the serial number. Enter it here and post back the model/year information:

https://selfsolve.apple.com/agreementWarrantyDynamic.do

What operating system (OSX) do you have installed?

Ciao.

Do you have a backup?

Boot the MBP into the Internet recovery (OPTION + COMMAND + R) keys.

This should result in a display with a spinning globe.

By following the directions, you can install the original OSX on to your MBP.

A solid Internet connection will be required.

Ciao.

ugochukwu73 wrote:

i dont have back up but that is no problem, The problem is how to make the system come up

Then try the directions that I posted.

Ciao.

Hold the OPTION + COMMAND + R keys and then press the power button.

Ciao.

Here are more detailed instructions:

http://osxdaily.com/2014/12/14/reinstall-os-x-mac-internet-recovery/

Ciao.

first shutdown and hold command + option + R keys then press the power button and yeah there is no need to press the '+' button,then follow the steps as given in above🙂

ugochukwu73 wrote:

Should i on the system before holding ? because i tried it but it did not come up also should i press + sign?

No, do not hold the '+' sign.

What happens when you hold the three keys (OPTION, COMMAND, R and POWER)?

Ciao.

ugochukwu73 wrote:

i hold the 3 bottom together OPTION, COMMAND, R nothing happen

And then you pressed the POWER button holding OPTION, COMMAND and R? YES?

Try a SMC reset:

https://support.apple.com/en-us/HT201295

Then try a NVRAM reset:

https://support.apple.com/en-us/HT204063

Ciao.