How to replace screen in mac book pro laptop computer

This might help

https://www.ifixit.com/Guide/MacBook+Pro+15-Inch+Core+2+Duo+Models+A1226+and+A1260+Optical+Drive+Replacement/669

I’m happy to assist further over the phone at https://www.6ya.com/expert/ronald_f3c54257e2cc2559

your video cable may need to be reconnected, but it's likely that the lcd is bad.

ifixit has guides for repairing and replacing on macs.

I've had this problem before. I had to get the trackpad replaced. Luckily I had AppleCare at the time.

May be worth just buying a new one.

Force the turn off by pressing the button.
Turn it on and after the chime press and hold together command and S keys.
This will take you to single user mode. Read for warning during this process.

Sounds to me that you might need to reinstall your OS and in the worst case your HD is gone.

oooooim sorry either go and buy q new screen and replace it your self or buy a new mac

Check your user manual for a start. These models the early 2011 models of MacBook Pros work in TDM. See OS X Lion: Use another Mac as a display.

Then, you have fried the motherboard. Have him replace it.

Try to reset the PRAM and SMC follow the Process in Apple webpage.If still the issue persist try removing the Ram and check with a good one if you have any.this should solve the isue.If still the issue arise then it can be a logic board problem

the hard drive has failed. Replace hard drive.