I suspect you may find one or more bad parts. If
you're
expecting an answer like C34 or U26, you have a lot to learn.
Might as well start now.
Exactly. There are few, if any, 'stock faults' on classic computers. A
blank screen (or whatever) can be caused by a lot of different things.
Maybe some ware more likely than others, but you still have to do the
tests to find out what has actually failed.
Another thing that a lot of people (not on this list, I hope :-)) don't
realise is that there's no 'magic box' that you plug into a computer (or
anything else) that tells you what's failed. Test equipemnt is essential,
but in the end, _you_ have to interpret those readings to work out what
the problem is.
-tony