Could you post the output of the device tester please.

Was the description changed or blank during the last scan?

Could be a problem with snmp timeout or community name wrong.

In the tsysOIDlookup table, we have:
OID = 1.3.6.1.4.1.11.1, Model = HP LaserJet 1022nw

Running device tester against two of my devices, they have that same OID, but are different model printers:

10.249.18.21 Ping OK
SMTP port is closed
SNMP Active
MAC address: 00-12-80-49-4A-44
FTP port is closed
Telnet port is closed
SMTP port is closed
HTTP port is open
HTTP headers:
Transfer-Encoding: chunked
Pragma: no-cache
Cache-Control: no-cache
Content-Type: text/html; charset=UTF-8
Expires: Thu, 01 Jan 1970 00:00:00 GMT
Server: Virata-EmWeb/R6_0_1
HTTP title: HP Color LaserJet 2820 / 10.249.18.21
HTTPS port is closed
SSH port 22 is closed
Device is a printer
Model: HP Color LaserJet 2820
Displayname: NPI21FF8C
Location: Boise, ID, USA
Description: HP Color LaserJet 2820
Contact: helpdesk
ObjectID: 1.3.6.1.4.1.11.1

10.249.18.34 Ping OK
SMTP port is closed
SNMP Active
MAC address: 00-12-80-49-4A-44
FTP port is closed
Telnet port is closed
SMTP port is closed
HTTP port is open
HTTP headers:
Transfer-Encoding: chunked
Pragma: no-cache
Cache-Control: no-cache
Content-Type: text/html
Date: Thu, 1 Jan 1970 0:0:0 GMT
Expires: Thu, 1 Jan 1970 0:0:0 GMT
Server: $ProjectRevision: 4.0.2.38 $
HTTP title: HP Color LaserJet 2600n
HTTPS port is closed
SSH port 22 is closed
Displayname: banetprn714004
Description: HP ETHERNET MULTI-ENVIRONMENT
ObjectID: 1.3.6.1.4.1.11.1

What I seen the device listing as Model for these is what is in the OID database (HP LaserJet 1022nw).

Can you do something like this to populate the devices Model?

First use the SNMP Model field, if empty then
SNMP Description field, if empty then
use the the OID table

Is it possible to post a screenshot of the webpage for one of the "Host Lexmark Optra Lexmark International"

Not sure you can do better on this one. It's an external HP JetDirect (USB connection). Mine is connected to a Dymo LabelWriter 400 Turbo as the JetDirect web interface shows. But smnp/http headers don't help.

http://cid-34ab6a14a19ad...r-but-label-printer.jpg

10.227.155.29 Ping OK
SMTP port is closed
SNMP Active
MAC address: 00-01-E6-92-D1-40
FTP port is closed
Telnet port is open
SMTP port is closed
HTTP port is open
HTTP error: The operation has timed out
HTTP headers:
HTTPS port is closed
SSH port 22 is closed
Displayname: prn013
Location: Campus
Description: HP ETHERNET MULTI-ENVIRONMENT,ROM M.22.01,JETDIRECT,JD89,EEPROM M.24.06,CIDATE 10/17/2002
Contact: helpdesk
ObjectID: 1.3.6.1.4.1.11.2.3.9.1

@Ponchohobono

Actually your:
1.3.6.1.4.1.641.1 Printer Lexmark Optra Lexmark International (This is a Lexmark Optra T614.)
is really a:
Dell Laser Printer 1700n
no wait it's really a:
Dell Laser Printer W5300

It's not a Lansweeper issue (may be one to deal with), but some of these devices are using the same OID values (see my earlier post on this thread a couple up).

Lansweeper with the latest build looks like they are pulling secondary values for these devices as now for me the Device Model is at least showing correctly (yeah!):

http://cid-34ab6a14a19ad...sweeper/same-OID-02.jpg
http://cid-34ab6a14a19ad...showing-device-type.jpg

They still show up as Hosts, not Printers, and the Vendor can be wrong. Trying to figure out where to help at this point.