Electronics Forum: intermittent failure (Page 1 of 3)

Epoxy crack causing intermittent failure

Electronics Forum | Thu Feb 22 13:11:51 EST 2001 | keithtbe

Silver epoxy is used to joint the LED beam lead and the trace of the flexi circuit. Due to the LED mounted skew upward or downward unconsistently, the strength of the joint weakened and causing the LED lights up intermittently. I would like to ask fo

intermittent accessory power failure

Electronics Forum | Tue Sep 10 08:46:10 EDT 2013 | rway

You're in the wrong forum. I doubt anyone here will have any experience with your type of issue (without researching it). Have you tried the dealer or a dealer related forum?

intermittent accessory power failure

Electronics Forum | Mon Sep 09 11:18:23 EDT 2013 | shirjer

We have a Vansco system on our 2005 Alpine Coach motor home. We have an intermittent outage problem with the 12V lighter socket. I can plug something in, like the tire sensor monitor, or the GPS, and after I remove it, the outlet no longer works, n

Bga failure

Electronics Forum | Mon Oct 02 19:04:53 EDT 2006 | DC

We had a issue on the SBGA and found stress built up at the corner of the SBGA after cool down to room temperature. It is confirmed by the warpage analysis. I expected that the stress caused by the heat spreader and the epoxy to the copper frame. O

Component Peel Strenght

Electronics Forum | Tue Oct 10 16:27:21 EDT 2006 | slthomas

No but the owner of the last company I worked for used to think prying PLCCs off the board with a screwdriver (using an R0805 as a fulcrum and crushing it in the process) was a valid test. "Feels pretty weak...our intermittent failure must be a pro

Universal sequencer

Electronics Forum | Thu May 24 22:26:08 EDT 2007 | slthomas

Of course we all know those intermittent failures never come back after a successful Monday a.m. boot. ;)

Warranty on Prototype boards

Electronics Forum | Thu Oct 24 12:09:31 EDT 2002 | slthomas

Have you looked at cross-sectional analysis? If they can provide you details of where the failures are occurring, maybe you can chop one up and see exactly what's going on? We've done it once for our own engineering department and the results (not

BGA pads lifting from PCB

Electronics Forum | Thu Jul 02 16:01:57 EDT 2009 | ewchong

thanks kpm. agree the cause of those pads lifting. all of them were no connects so they cannot be the cause of the electrical failure. when the bga was removed, all the solder balls on the pcb turned into conical shape due to the separation, except

BGA pads lifting from PCB

Electronics Forum | Tue Jul 07 05:55:34 EDT 2009 | kpm135

I agree with your assessment of the two pins with irregular solder. The head-in-pillow or broken joint are both probable events for your defect. At this point in the process it will probably be difficult to pinpoint the exact cause. If it was a broke

Porosity in Good Plating

Electronics Forum | Mon Jul 07 00:22:38 EDT 2003 | sam

Thanks for all the answers. I should clarify that the problem was found to be on the SMT LED gold plating, instead of PCB gold plating. We had confirmed this problem by running some DOE experiments and some reliability testings. We had decided to d

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