Replace the power adapter. We have seen this with our 4305G's in the field, after 4 years+ of no issues in both indoor and outdoor enviroments some of the adapters have started failing. Sometimes we have been able to clean them, but usually it is just a replacement. Cisco doesn't have the power adapters anymore but you can get them OEM from other vendors for about $70. I know this seems like an odd solution, but we have found that the adapter just isn't putting out the required power anymore. Do not try and use an adapter from a 4310, they will fry the 4305. Hope that helps. Jh
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