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E4440A won't switch on


 

Hi, we have a E4440A 26 GHz spectrum analyser at work. Last time I used it was a year ago, and all was fine. Last week a colleague moved it to a different lab and it wouldn't turn on. The standy LED came on, which suggests that the +15V power supply rail was fine. By not responding to the power switch, suggests that there is an issue with the +5V rail. I got this information from the service guide. I then moved the analyser back to its original lab, at which point the standy LED no longer comes on. I'm wondering if a connector somewhere has become dislodged. Has anyone encountered this before?

Thanks

Gavin

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