HP 7510 AIO printer won't stay connected - Wired workstatio​n, wireless printer

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Hi!  I spoke (and checked solution button) too soon. The printer still "disappears" from the Wired XP network workstation. The only difference since applying the solution given is that the disconnects are now happening about every 12 hours, vs every couple of hours.
Ink notification is set to "only when I print"
Static IP is set for all machines
HNDU works -- when the printer is visible but will hang the workstation if printer is not visible.
Original comments follow below; 
HP 7510 wireless printer disappears -- 4 station XP wireless network, w/ 1 PC hardwired.
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04-12-2012 03:59 PM
Printer: HP 7510
Network:  multi-station wireless, thru DLink DI-632 (one PC hardwired to router)
Address Config:   Printer is using static IP -- outside of DCHP range (192.168.15.240)
Printer Config: Each computer has static IP set into the control panel app, using IP addressing.
Operating System:  XP (Service Pack 3)
Other devices:  Ipad, Xoom and Kindle Fire (all working using ePrint)
Network Security Protocol: WEP (we're out in the country)
Network Setup:  Main router, along with 2 access ports (hardwired); currently using channels 1, 5 and 11 (again, we're in the country and have little competition for channels)
File Sharing: All machines in network have one open "share" drive, accessable with passwork.
Scenario:  Wireless computers appear to stay connected for several days to a week at a time. (We reboot weekly, just as a SOP)
Computer that is wired to the network loses communication with the printer a couple of times a day and needs to be rebooted in order to restore connection.
When this happens, other machines continue to print and scan, with no problems, and the wired machine continues to have its name displayed in the SCANNING panel on the printer -- but the printer won't talk to it.   All network functions, including internet and intranet access to the printer's EWS is still available.  I have noticed that if I go into check ink levels, though, that the ink check software behaves differently. 
Normally in the ink status app, there is a small "working" icon with 6 dots. When this computer is connected properly, it will start jumping around the circle, showing activitiy, get to 41%, and then display the ink status info.  When the printer/computer connection is not working, the "working" icon will go to just a couple of percent then jump to the printer information page, showing make, model, serial number, firmware level etc.
In every instance so far, rebooting (with no other action) brings the printer/computer connection back to life -- until next time.  I am trying to find any other pattern for this behavior, just can't identify it yet.
I started out with the plain vanilla installation, but then every computer in the network would consistently drop connections, about every 45 minutes. Using the info on this forum, I've eliminated the drop-outs for those printers, and got to the Static IP solutions (we've done that anyway for years with net-ready machines).  This is the last machine that "drops off"  It appears that some piece of HP-required software is "dropping out" or getting clobbered, but I cannot see a pattern, even checking and noting the various software used locally on the machine, and the various websites visited. So far, no pattern.
I am hoping that an HP guru with access to the source for the "ink supply" status software can take a look at what is happening and why it will always go to 41% and then display ink status (when connected) and then only go a couple of percent and display the ink status (when it isn't connected).
Thanks, in advance,
jim
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jimzix
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Re: HP 7510 wireless printer disappears -- 4 station XP wireless network, w/ 1 PC hardwired.
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04-13-2012 01:48 PM
More info:
In last paragraph, above, the request for "ink status" is returned with a static display of the printer firmware version, driver version, step level, MAC# etc of the printer, not "ink status" when the printer is disconnected.
Also, when printer is disconnected the HP home networking utility will hang the system -- a hard reboot is required, which restores the printer, until the next time it goes "into the woods".  Signal stregth, measured on the printer, is 4 bars (very good).
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007OHMSS
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Re: HP 7510 wireless printer disappears -- 4 station XP wireless network, w/ 1 PC hardwired.
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04-20-2012 09:30 AM
Not sure if this would help, some of the info could be pertinent:
http://h10025.www1.hp.com/ewfrf/wc/document?docnam​e=c03149924&tmp_task=solveCategory&cc=us&dlc=en&la​...
007OHMSS
I am a support engineer for HP.
If the advice resolved the situation, please mark it as a solution. Thank you.
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jimzix
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Re: HP 7510 wireless printer disappears -- 4 station XP wireless network, w/ 1 PC hardwired.
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04-22-2012 09:53 AM
Thanks!  That appears to solve the problem.  After your suggestion, I remembered that I set the "ink level warning" on this machine ONLY to "Always warn me", as opposed to "tell me only when I am printing".  That seemed to be the problem. Only the computer that was set to "always warn on low ink-levels" was disconnecting -- the others worked fine! Now, all are working fine.
Just to be safe, though, I've also turned off the "scan from printer to computer" function on each computer. That was set for each machine, and seemed to work fine. The other machines in the network did not disconnect, and the printer was tracked whether each computer was on or off.   May try to turn it on later; I'll see if the family uses that feature very often!
Thank you for your help. 
Jim
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Re: HP 7510 wireless printer disappears -- 4 station XP wireless network, w/ 1 PC hardwired.
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04-22-2012 03:56 PM
I spoke too soon!  After about 26 hours, the printer connection on the one "hard-wired" CPU dropped, which is better than before, but still not solid.  Same exact symptoms as before. Only piece of the puzzle that was different this time is about 50 pages were scanned, some to this computer.  Used the "Scan requested from CPU" process, rather than enabling the "Scan TO Cpu" function in the software app.  It did not drop the connection immediately after -- about 1 hour to 1.5 hours afterwards.  Suspect this is a coincidence, not a cause of the problem with this machine.
I also scanned (same approach) from one other CPU on the network -- that wifi connection is still rock-solid.
Jim
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Answer 1

I think it is fixed now.....the problem seems to reside in the module that will notify you immediately if ink is low (vs notify me only when printing).  If, when initially installed, the user selects "immediately", then the printer will randomly disappear. (More on "re-finding it" later.)
Also, it is difficult to change the ink notification setting, because it appears not to be "sticky", but will sometimes, flip. (I've not figured this out yet).  As long as the setting for "low ink notification" is on "only when printing", life is good.
If the printer does disappear, go over to the Advanced tab when the printer software/firmware page comes up, instead of the current ink levels.  Reset the selection about "tell me about ink notification" to "only when printing", and then toggle the "autoshut off" from "NEVER" to "2 hours" and then, finally, back to "NEVER".  Then, lastly, press closed on the panel.  Printer should be connected again. To test, go to the Photosmart 7510 app again, and select "Show estimated ink levels".  The counter will start at 1%, jump to 41% and then bounce around until it displays the ink level.
FOR HP TECH:  Please consider making the "ink level notification" persistent in the registry OR provide a de-install tool that will completely clean all traces of the prior installation of the 7510 driver / app in the registry, so that a new install may have this setting saved correctly.
Hope this helps some of you -- it's an excellent printer once its running!
jim