You should not leave your computer on standby

Booting your computer each time you want to use it can be inconvenient, but keeping it in sleep mode may not be the best alternative.
The sleep mode on your computer is designed to keep the machine on while drawing a small amount of power. While the dollar cost may be minimal, the true cost of let it sleep may actually be higher.
You shouldn’t leave your computer on standby if you’re going to be away for more than an hour. Doing so can result in more harm that good. Your memory is still fully functioning, and without cooling fans running it can lead to overheating and damage. It’s always better to fully power down and let your machine rest.
Under normal conditions, turning your computer on and off won’t cause damage. These days, laptops and desktops are designed to withstand 40,000 power-ups and shutdowns before failure. That’s the equivalent to turning your computer on and off 15 to 22 times per day for up to 7 years. Of course, If you have extreme conditions, very cold, very hot or very damp, it’s best to not use your computer at all.
So, when it comes to your computer, be mindful of letting it sleep for too long and power down instead. Otherwise, the low-cost convenience of having it on standby may result in a higher cost in repairs down the road.