HT3500 My iMac (running Lion 10.7.3) is connected wirelessly to a Laserjet 2550. This has operated fine for a long time, but now th printer cannot be found when TimeMachine back ups are taking place. Does anyone know the cause & remedy please?

My iMac (running Lion 10.7.3) is connected wirelessly to a Laserjet 2550. This has operated fine for a long time, but now the printer cannot be found when Time Machine back ups are taking place - Bonjour does not show any devices being available when Time Machine is running. Does anyone know the cause & remedy please?

Your points match mine pretty well,though here are some thoughts:
1. I thought about this theory myself this morning (iTunes possibly causing more issues), but I haven't been able to verify it.
2. When I set up a new user it seemed better for a while, but the issue croppped back up. Yesterday I fully wiped the machine and reinstalled from scratch. I did not reimport my user from TimeMachine, but the problem has come back. My thinking was that I might have some really old software or prefs hanging around causing the issue. No dice.
3. This is my current theory of the issue, so my next step will be to pull the RAM from Crucial and see how the system behves. IF that doesn't eliminate the problem, I'll pull the factory installed RAM and replace it with the 3rd party RAM. The odd thing is how many people seem to have similar issues - I know two personally, and have seen several posts on forums. I think the most common point for this happening was the 10.7.2 update, which would point to software as the culprit.
4. That matches my experience.
My hope is that this will be repaired in the forthcoming 10.7.3 release (current production version is 10.7.2), but otuside of what I noted above, I'm at a loss.

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http://support.apple.com/kb/ht3964
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http://support.apple.com/kb/ts1713
Thank you for using Apple Support Communities.
Best,
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Stedman

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HT3500 My iMac (running Lion 10.7.3) is connected wirelessly to a Laserjet 2550. This has operated fine for a long time, but now th printer cannot be found when TimeMachine back ups are taking place. Does anyone know the cause & remedy please?

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