You should be able to check the capacitors in the
video section for
shorts. I'm not sure if you can diagnose other failures on capacitors
(the most likely culprit) with only a multimeter.
That depends on the multimeter. Some have capacitance ranges. I wouldn't
be suprised if somebody had made a comined multimeter and ESR meter either...
But I do question the statement that capacitors are likely to be the
problem. I power analuge circuitry (PSUs, CRT monitors, etc) I would
agree that electrolytics cna dry up, or short, or.. But in digital
circutiry, the only capacitors you are liekly to find are low value
ceramic ones (e.g. as a load for a crystal) which are very reliable, and
sppply decoupling capacitors. If the latter fail open, then provided only
1 or 2 have gone you won't notice it, and if they fail short than either
the cupply rail is pulled right down (easy to spot, although finding
which capacitor has shorted is nore 'fun'), or the capacitor gives itself
away with smoke signals (tantalum bead capacitors are good at this :-)).
-tony