Thanks for the help. I have a feeling my monitor could be part of the issue, it does switch to the digital input when power is applied to the OSSC and it doesn’t go into standby after a few minutes. It just doesn’t show an image, just a black screen and the OSD is not responsive. What would the resolution of the test image be?
I would like to try another monitor before getting a replacement IT6613. The soldering looks good under high magnification. I have tried with the HDMI ESD diodes removed but with no change.