Today we look at the main reasons why your computer is not turned on and explain what to do if your Mac does not turn on.

So, if you Mac does not turn on, the reasons for it are two – you have a problem with display or a problem with the hardware. In both cases, it can be a miserable failure (which quickly resolved) or serious damage, because of which you will have to contact the service center.

If the problem is in the display you can check it simply.

Firstly, you should hear the sound of Mac startup, cooler operation, moreover, Caps Lock button should light up when you click on it. The computer is running, but you just do not see what is happening on the screen. If so, it is best to contact the experts, instead of makeshift attempts to correct the mistake yourself.

But sometimes it can be a problem with Mac “asleep”. I noticed that from time to time computer wakes up very hard and it needed some time to understand your intentions with respect to it. But we are talking about a few seconds, instead of the long period of time.

If you press Power button, but nothing happens, then the problem is with hardware. It is more problematic than the display, but there may be many causes which can be resolved without the intervention of engineers.

• Check the power cord. Sometimes the cord is disconnected from the computer, so it is not included.
• Broken outlet. Enough stupid situation, but possible – it seems that Mac is not charged, and the problem is not in it.
• Double-check the work of the charger – the problem is probably in it.
• The problem may be in a fully discharged battery – if it is completely discharged, it will take time to Mac a little charge before switching.
• Turn off all power-consuming accessories – mobile devices, USB-printer, and the rest devices. Perhaps they consume a lot of power.
• Try hard reset. Press and hold the Power button on Mac for 10 seconds and then reconnect the charger and try to run the device. Often it helps.
• If you have “upgrade” your Mac with new hardware – the problem may be in improper installation. Double-check that all is in place and is properly connected.

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TVs with support for ultra-high resolution 4K TV already released quite a lot. They even have become much more affordable. But one of the problems remains a chronic shortage of appropriate content, without which to evaluate all the advantages of 4K will not be possible.

Fortunately, by the end of this year, this problem is at least partially be solved. Services Netflix and Amazon are actively working on the completion of their bases with new content. In addition to services, video on demand, in the second half of the year is expected to spread media 4K TV Blu-ray players and relevant. But the “live” television format 4K TV  in the near future there will be only a dream.

Of course, the emergence of streaming video, video on demand, video disk format 4K is already good. But “look 4K TV” in the traditional sense, that is, switch on the TV, see the guide channels and select 4K ESPN, 4K NBC or 4K Food Network … such a scenario yet considered by experts as the distant future. Maybe it will take several years, for example, seven or even more.

As for 4K TV shows and movies, the content for this type of problem does not exist

Even more convenient to watch it not real broadcast and on-demand, when it is convenient. But sports live broadcast, political shows, and some other major events, such as the next World Cup or the Olympic Games require still “live” broadcast.

While that single little progress in this direction is still there. For example, on January 15 organized the first transatlantic “living» Ultra HD-broadcast NBA games. Prior to this, similar experiments were carried out as rugby and golf.

The stadium London’s O2 Arena company BT Sport to organize a system of eight 4K-camera and broadcast a special setup that encode, compress and 4K-broadcast content at a speed of 15 Mbit / s. According to eyewitnesses, 4K-broadcast visually really very different from the standard HD.

The big difference is evident in the time of the transfer chamber into the stands or bench players, when each person is displayed with a very high level of detail.

Interestingly, the 4K-video and failed to broadcast without significant delay. Compared with the HD-broadcast delay was approximately six seconds.

On the way the mass distribution of 4K-television and costs too much load on the existing communication channels. Even the best current methods do not allow to obtain a compression of less than 15 -20 stream Mbit / s.

Cable providers in the majority today, can not afford such a wasteful use of resources. Need to change the infrastructure, equipment, adopt new standards, for example, ATSC 3.0. But this will require many years.

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