The second HP 16717A board

Let's hope we can repair this one too ;) The initial state reported the following errors:

The initial set of test failures
The initial set of test failures

This looks better than the first card, actually.

cmpTest

The cmpTest failure, with details:

The cmpTest failures
The cmpTest failures

Slot Chip 8 (U22) two bad bits: 0 and 13. It was in this area:

Comparator traces to "Chip 8"
Comparator traces to "Chip 8"

vramSerDataTest

vramSerDataTest failures
vramSerDataTest failures

This one was easy too: just two traces between the RAMs and U22. After that the board also passes all tests. Easy peasy ;)

Last modified: 2026/10/24