@dderg, Welcome to the HP Support Community!
Thanks for reaching out about your query regarding OfficeJet Pro 9135 still "offline"/"turned off"!
We're thrilled to have the opportunity to assist you and provide a solution.
You've definitely put in a lot of effort already — so let's see how we can get this sorted out for good.
First off, even though the printer is refurbished, that doesn’t necessarily mean it’s the reason for this issue. HP certified refurbished products are tested to meet the same standards as new ones. Plus, there's usually a 90-day replacement period for refurbished products, so if it turns out to be a hardware issue, you have that safety net.
It sounds like you’ve already tried most of the key troubleshooting steps, but just to cover all bases, could you take a look at this official HP guide? It walks through solutions for when your printer shows as offline:
👉HP printer is offline or unavailable | HP® Support
If you’ve already gone through all the steps there, let me know — we can dig deeper together. Also, the setup and icon inconsistencies you mentioned are unusual. It’s possible that the firmware might need an update, or there could be a network configuration issue that’s causing the setup options to misbehave.
We’ll figure this out — just keep me posted! 😊
Take care, and have an amazing day!
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Regards,