"William Sommerwerck" wrote in message
...
As someone else suggested, an intermittent power supply is almost always
caused by a defective cable. Regardless, now that it's open, you can touch
up all the solder joints, and put an ohmeter on the power cord.


A trick I often use on suspect leads is to use a SLA battery and a H4 bulb
with one or both filaments, often an intermittent lead fails to show up on
an ohmeter or continuity tester, the over 4A (or 8A) will make most
intermittent breaks permanent.

Needless to say the OP would be well advised to unsolder the lead from the
PCB before applying this proceedure.