1 Dec
2004
1 Dec
'04
10:56 a.m.
I've got a board here with a short between ground and the +5V rail
(actually not quite dead - I'm getting around 10 ohms between the rails)
Any useful tips for finding the fault? It's a large board, multi-layer,
lots of silicon on it unfortunately :-(
10 Ohms is not a short! It might even be the right resistance. Have you
tried powering it up?
Are there any particular components that are likely to fail in this way
that might be found across PSU rails? (decoupling caps, certain ICs,
crystal modules etc.?)
Most times something shorts (particulalrly a decoupling capacitor) it
goes dead short (<< 1 ohm).
-tony