Pi zeros and Pi zero w no HDMI but does install stretch

[pcote_pi]

Allo,

All my PI zeros (3) won't display anything after power ON. There is activity as the green LED is flashing. But nothing shows up?

I have had 2 PI 1 model B+, 3 PI2 and 2 PI 3 ... all work, all boot, all show Raspbian up and running. So I fail to see what I did wrong with the PI Zeros??? I check the forum and the web and tried modifying the config.txt. Nothing successful.

Swapped HDMI adapter, HDMI cable, SD cards, displays and even Pi Zeros ... same result.

[HawaiianPi]

What did you modify in config.txt? You really should post these details or we'll all waste time.

Is your Pi Zero in a case? If so, try removing the case (it might be preventing the HDMI adapter from fully seating in the jack).

What are you using for a power supply?

Create a new, empty config.txt and try this (and only this):

Code: Select all

hdmi_force_hotplug=1
config_hdmi_boost=8

[fanoush]

Had same experience, increasing config_hdmi_boost helped in my setup (lcd+cable+adaper) with plain Zero. Looks like Zero is weaker than Zero W in this regard as Zero W worked without tuning (tried with 2x Zero W, 3x Zero). Also my direct miniHDMI to VGA adapter needs hdmi boosting with Zero.