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I have managed to restore my printer to a working state.



What Phil said appears to be valid.

The issue was probably related to ink sensor inside the printhead, which upon detection of air...

Since I have invested some money into this printer I want to at least try to solve it.

By ink pump lines you mean something that is located within the printhead module itself:...

It does seem that low post count triggers anti-spam measures.

I changed my e-mail, and used activation link, but it still would not let me post without moderator approval.

However I have posted...

Hello,

I have an issue with HP OfficeJet Pro 8730.

When I try to print a page, or initialize the printer after performing OOBE reset, I am encountering weird pump like noises from the printer...

I am looking for a service manual for HP OfficeJet Pro 8730, or related models (like 8740).

The oldest firmware I was able to find is 1903B, but I have also found 1919A.

Based on file name both are compatible with OfficeJet 8730, 8740, and probably 8745.

I am posting that in case...

Welcome!

Hello.

Hello,

I have an issue with HP OfficeJet Pro 8730.

When I try to print a page, or initialize the printer after performing OOBE reset, I am encountering weird pump like noises from the printer...

Would someone be willing to post a new thread in my name?

I tried to post a thread about a printer issue 3 weeks ago, but threads posted by people with low post count (at least it seems to be my...

Hello,

I have an issue with HP OfficeJet Pro 8730.

When I try to print a page, or initialize the printer after performing OOBE reset, I am encountering weird pump like noises from the printer...

Hello, Does anyone know where I could find older firmware for HP OfficeJet Pro 8730 (EU, if that matters)? I am talking about firmware older than 1708D, but I would also need 1919A. Thanks.