My hp 4500 fax is stuck on "busy" to "redial in 0". What do i do? [email protected]

You have to be in the fax screen and find your User install or Initial settings screen. Redial can be set there. There's a default setting that I think you can set to "0" redials. I haven't had that manual for a long time.

1. unplug the power cord
   
2. hold buttons '#' and '6' as you plug it back on
3. while still holding, power on the printer
4. after a few seconds, it will show semi NVM reset or something like that, and start the factory default setup (pick language, align cartridges, etc.)

Using the HP Network Diagnostic Utility in Windows - HP Customer Care (United States - English)

is that a fax error code?
well here is the description for error 634:

Redial count over with no
response, or busy tone was not
detected.
Note:
U.S.A., and Canadian models
will redial only once if a busy
tone is not detected.

this happens when you send fax on an autofax destination.
you may also check your setting for your redial count
that's it :)

please go to this link and setup your redail time. fax will not redial if your are sending fax in manual mode.
http://www.brothersupport.com/Facsimile/ALL/UG_FAX2820_FAX2920_MFC7220_MFC7225N.pdf

Do you have a DSL or other digital phone line?

Hi,
This is what the code means:
Redial was not successful due to no response from the called station or wrong number dialed.
Note: If busy tone was not detected, the machine will only redial once.
So the your fax machine is getting no response from the fax you're calling.
Hope that helps...

That codes says:

"Redial count over with no response
or busy tone was not detected.
Note:
U.S.A. and Canadian models
will redial only once if a busy
tone is not detected."

The number you're dialing was first busy. When it went to redial, it detected no phone signal on the other end. If it happens to only 1 or 2 customers, then it's something to do with their lines and you can't fix that.
If it happens often, then get your phone lines checked out by your phone company, make sure your fax is not sharing the line with another other device and make sure it is not a digital line.
Other than that, you're looking at having to replace the main board in the fax. Which basically means it's time for a new fax machine.

Go into the admin mode or user mode to reset the default settings. Procedure should be in the op manual.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

pleas close the redial option and other number may be busy or finished