After more checking I do get video out, but it's blank. The keyboard and mouse don't work. The Ethernet link is never activated. If I stick a memory card with a valid OS in the system comes up just fine and everything works, video, keyboard and mouse and Ethernet. So it's not a hardware problem with the Raspberry Pi or the TimeHat.

If I put a blank memory card in then I get no video output. At first it looks the same as what the TimeHat memory card is doing, but if I go into the menu on the monitor there is a difference.

Robert


On 07/05/2021 07:04 AM, John Miller via time-nuts wrote:
Robert,
If an HDMI display is connected when the board is booted, video should be 
displayed. If no display is connected when the system is booted, the HDMI port 
is not activated, and you cannot attach a monitor to it after the fact.

If this is something you and others would like to do, I can work out a method 
to reconfigure it such that video is output all the time. Just keep in mind 
this will take consume some system resources and add some CPU overhead.

Regards,
John

On Jul 5, 2021, at 12:23 AM, Robert DiRosario <ka3...@comcast.net> wrote:

On the Raspberry Pi TimeHat is there output to the HDMI connector, or is it 
configured to just use a serial console?
I'm using the preconfigured SDHC card, so the software should be fine.  If I 
swap out the SDHC card with a different one the systems boots fine, so the 
hardware works.

With the card with the software there is never any output to the HDMI connector.

Based on the LED on the GPS module it's locking up on the GPS signals just 
fine.  After the initial lockup, it locks up again in only a few seconds after 
a power cycle.

Robert
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