my e4405b still restart any advice pls?
For help with your question, I recommend that you contact Keysight support for your instrument. You can do this by visiting the E4405B product page and clicking the link in the upper right "Contact an Expert", then viewing the "Support Specialists" tab. This will show you a few ways to contact Keysight support at your convenience.
Service and repair services are also available for the E4405B. You can find these options here, or by clicking "Currently Supported" in the Product Status line of the product page.
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