Question Gigabyte DS3H Z370M onboard video doesn't work

Waylander131

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Oct 15, 2015
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Hi, community,

Sys description: MB: GIGABYTE DS3H Z370M with Core i5-9600K, 16GB RAM (2x8)

Here is my problem: I had this system for a while, with i3-9100F and RADEON RX-580 graphics. Everything worked fine, unfortunately, due to budget needs I decided to sell the video card and monitor with the intention to use the onboard video and my TV as a monitor, and because I knew the i3-9100F didn't support the onboard video, I upgraded it with an i5-9600K. However, after installing the new processor and connected my TV's HDMI cable to the onboard HDMI port, I get "no signal" after powering up the system. The fans spin normally, I can hear the backup HDD making sounds as if during normal operation, but no video, USB power to keyboard and mouse goes off after 15sec.
Any ideas?