HP Officejet 8520 Flaky on Windows 7 Pro Machines

I'm supporting a site where a relatively new HP Officejet 8520 is set up as a network printer using a wireless connection to the network.

It appears that all of the computers can print OK.
As I recall, I removed all of the old printers when this one arrived.
And, I installed the FULL software from a fresh HP download.

It's a common task to scan pdf to a computer file - controlled from the computer side.
At times this "breaks" and the printer won't scan from the ADF.  I'm not sure they tested from the glass directly.
I've tried a number of things to fix this but the problem is elusive.
Today, they rebooted both the printer and one of the key computers and now everything is working again.

The failure mode is that the HP Scan software just hangs when asked to actually scan.

I see that using HP Scan on the computer will allow the selection of .pdf output.  But, the same type of setting on other scan interface software only will do .bmp and one othere non-pdf format.  No pdf selection is presented.  This seems odd and is inconvenient when testing.

- the printer is bad but intermittently so.
- the wireless connection isn't adequate to support scanning - whether that's due to the wireless system or the printer's wireless interface.
- the computer software needs to be reinstalled (again?)

Any suggestions re: how to get past this intermittent failure?
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Fred MarshallPrincipalAsked:
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JohnBusiness Consultant (Owner)Commented:
I'm supporting a site where a relatively new HP Officejet 8520 is set up as a network printer using a wireless  ...  - the wireless connection isn't adequate to support scanning

Yes. I never set these printers up wirelessly. Make it a wired connection, restart the printer and try again.

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Fred MarshallPrincipalAuthor Commented:
John Hurst:  Thanks for the response.  

That you never do it is nice to know.  But it's not conclusive is it?
But, it sounds like wired connections are always successful.
If you always tried wireless connections first and were getting 50% bad results when scanning, then that would be a much clearer indicator.

Why do you never set these printers up wirelessly?  Maybe there's information there that would help.
JohnBusiness Consultant (Owner)Commented:
Print and scan traffic is very chatty. Wireless connection can easily be broken or interrupted. That may not affect some traffic, but I have found it does affect printing and scanning. So I always hook these up wired.

Here is a fairly balanced comparison:


I much prefer wired for the stability I get.
Fred MarshallPrincipalAuthor Commented:
John Hurst:  Thanks!
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

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