Wireless pc's can't see Konica Minolta printer but can when hard wired.


I have a Konica Minolta tech that has asked me twice this week about an issue he's having.  Now that it's happen twice in one week (with two different businesses) I'm thinking it's something to do with the Konica Minolta settings itself and maybe he's not aware of it even though hes the Konica rep and installer.

Anyway, here are the details.  There are desktops on the network that are hard wired to the router and there are other desktops and laptops that are wireless but on the same network.  When any of these pc's are hard wired they can see, install and ping the Konica Minolta printer just fine.  As soon as the network cable is disconnected from any of these pc's and the wireless is enabled they can't even ping the ip address of the Konica Minolta printer.  They can however, still get on the internet and ping other devices regardless if the other devices are wired or wireless.  AGAIN, the wireless devices can ping other devices on the network (wireless and wired) but NOT the Konica Minolta.  The Konica Minolta is the only device that can't be pinged from a wireless pc.

I'll be going back this week most likely the trouble shoot in person again but I was wondering if anyone has experienced this with Konica Minolta printers.  

Thank You.
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AkinsdConnect With a Mentor Network AdministratorCommented:
I was a Snr Network Engineer for Konica Minolta for about 10 years.

Windows 7 and 8 will sometimes appear as not connected (greyed out) because the computer can't communicate with the printer. Symptom - Device responds to ping but printer is greyed out. This is not limited to KMs alone FYI

The problem may also be on the router. I've seen some home routers apply stricter settings to wireless devices compared to wired.

Check the settings of the router, or try connecting the printer to a switch. Use the information below if you have to reprogram the copier

You will need to log on to the admin console of the printer (depending on model, the default passwords are 00000000, or 12345678, or 1234567812345678)
Check the TCP/IP settings and make sure it is set static and the correct IP and subnet is configured.
If you make changes, wait for confirmation and the prompt to restart the printer.

You may have to go through the setup again.
- Set the ip to auto
- wait for confirmation
- restart the printer from the main switch (not the one by the control panel)
- log back into admin mode and change settings to static and manually configure addresses
- wait for confirmation and the prompt to restart the device.
JohnConnect With a Mentor Business Consultant (Owner)Commented:
Try two things:

1. Do a TCP/IP Reset and Flush DNS.

Open cmd.exe with Run as Administrator
Then  netsh int ip reset c:\resetlog.txt
Also, ipconfig /flushdns followed by net stop dnscache followed by net start dnscache
Restart and test.

2. Reinstall the printer driver while wirelessly connected.
PCGalOfCalAuthor Commented:
Ok, thanks.  Waiting for a call back to see when I can go out there.  :-)
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rindiConnect With a Mentor Commented:
Many wireless routers have a "private" mode (or something similar). This mode allows you to connect to the internet, but block local LAN connections. So check the settings of your wireless routers, you may just have to turn that off.
Craig BeckConnect With a Mentor Commented:
Can you do arp -a at the command prompt after trying to ping the printer from a wireless client to see if it can resolve the printer's MAC address?

The two businesses... Do they use the same wireless APs?  If so, what make/model are they?
AkinsdConnect With a Mentor Network AdministratorCommented:
Confirm if they're connected to the proper SSID and if the device are on the same network (vlan) as the printer.

Then, go to the properties of the printer, navigate to ports tab, click properties, enable snmp and click ok
PCGalOfCalAuthor Commented:
I've only been to one of the two businesses so far and I'm actually going back tomorrow.

Tomorrow I will try the arp -a although I don't really understand what arp command does.  I'll look it up.

The wireless client is definitely on the same network as the printer.  I looked in the router (At&t) and there is no private (or guest) network turned on.  Wireless devices can ping everything but the Konica printer, even hard wired devices.  

Having said this, I will double check that I'm remembering everything correctly.  I'm pretty sure I am.

I will definitely verify the SNMP option as well.

Thank You!  :-)
Craig BeckCommented:
I don't think enabling SNMP will have an effect - that won't stop ping from working.
PCGalOfCalAuthor Commented:
Ok...  Everything I posted before was correct.  To quickly sum it up...
 There is one at&t uverse modem/router.  
There is a Konica Minolta printer that is hard wired to the uverse router.  
Any device that is hard wired can access and ping the printer, no problem.
Any device that is wireless can NOT see or ping the printer.
HOWEVER, all device on the network whether hard wired or wireless and see all other devices EXCEPT THE PRINTER.
Wireless pc can access a hard wired pc but only wired pc can access printer.

I did the arp -a and the mac address was NOT in the list.
The only two things that make any sense to me is that there's a setting in the printer that the printer installer isn't aware of or there's some setting in the router that's blocking it.  

I did not apply Johns (1st post) suggestion just because I was running out of time and since this problem occurred  on several different wireless devices that I tried it can't be a computer issue.  One of the laptops I tried had never been connected to this network before.  Let me know if you still think it's worth a try.

I'm still waiting to hear back from the second business with the same problem to see what kind of router/modem they have.  Really wondering if it's a at&t u-verse.
JohnBusiness Consultant (Owner)Commented:
There is a Konica Minolta printer that is hard wired to the uverse router ...Really wondering if it's a at&t u-verse.

It is possible.

Can you put the AT&T router in Bridge mode and add your own Wireless Router. That may help a great deal.
Craig BeckCommented:
Windows 7 and 8 will sometimes appear as not connected (greyed out) because the computer can't communicate with the printer. Symptom - Device responds to ping but printer is greyed out. This is not limited to KMs alone FYI

The op clearly states that the device doesn't respond to ping from a wireless client.
PCGalOfCalAuthor Commented:
Thanks for all the input but at this time I don't the option of trying anything else.  The next thing I would try if I had the chance is a different router (putting at&t device in bridge mode).  Sorry I couldn't keep on this one but I'm pretty sure it's the router.  I should of just called at&t when I had the chance.  Oh well, next time.  Thanks again.
JohnBusiness Consultant (Owner)Commented:
Thanks for the update and I was happy to help.
Craig BeckCommented:
The question should be deleted.
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