mini pc lights up blue but the screen is not showing

[admin]

"1. Check whether the HDMI cable is in good contact (re-plug and plug to confirm that the HDMI contact is good);
2. replace the HDMI cable and try (using the built-in HDMI cable).
3. The BIOS self-test cannot be reset and booted. BIOS discharge tutorial.
4. If the above methods are not valid, follow the post-sale process
Detect whether the display is switched to HDMI display (VGA, HDMI, DP switching signal source is HDMI); replace the display to see if there is a display (exclude 1. Make sure the display is OK, 2. Signal compatibility issues). "

[Nicholas]

You only need to press the menu button on the monitor to switch the monitor signal. The model of each monitor is different and its function keys are also different.