Sound doesn't work sometimes

Usually it gets fixed after a reboot, but it reoccurs occasionally.

Screenshot

Hardware:

CPU: Intel Core i7 7700HQ

GPU: Intel HD 630

RAM: Samsung DDR4 8GB 2400 MHz

Motherboard/Laptop model: GL553VD

Screen(s) Number: 1

Screen(s) Resolution: 1920x1080

Audio Codec: ALC233 (ALCID = 16)

Ethernet Card: Realtek RTL8168H/8111H PCI Express Gigabit Ethernet

Wifi/BT Card: Intel AC7265

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Please help me!