Jaguar Failures

[duane]

We have managed to have 4 Jaguars that have failed. This is quite unusual for us. We have used Jaguars since the first year they were available (5 years?). This is the first time we have had this many failures.

The failure mode is that the Jaguar goes dark, no lights. When I hook the Jaguar to a variable power supply, the supply is unable to provide current to the Jaguar, indicating a short on the power supply side.

Inspection doesn't show any obvious signs of failed components.

I believe the failed devices are models from previous years before the conformal coating change. Debris is a distinct possibility, but I would hope that the device would recover once the debris is removed.

I'm looking for suggestions for diagnosing the problem, preventing additional failures, and potentially recovering these devices.

Thank you for you suggestions.