@mohamadhamdan: Based on the troubleshooting steps you have already attempted, I recommend arranging an engineer's inspection. To do so, please head to samsung.com > Scroll to the bottom of the page > Support > Contact us, and get in touch via your preferred contact method. From here an advisor will be able to assist you further, and discuss the available repair options in your area. I apologise for any inconvenience this may cause you.
