by Phil.c » Mon Aug 19, 2019 7:45 pm
If I were you, I would change the batteries, when you have the lids off, re-seat the ribbon connectors and any other connectors that you can see, but do it one at a time.
Re-check that you have all the cables connected right between HDR & D8b, clean and re-seat all the d8b cards, then boot up and check the CMOS, after that check the setups are correct, see where that gets you.