KMB 420 and 500 issue, machine freez

[bonc]

Hello, I've got some problem with two KMB's, one 420 and one 500. Both have firmware v.31 and it seems as same issue.
After few (sometimes its 50 prints sometimes 500 prints) machine freez. Current job is buffering to memory, but machine doesn't print it. It even getting another jobs to queue. But it feez like this.
Tried few drivers on computer, even few computers with diffrent windows versions. I've got no clue what can this be. Any help would be nice. Thanks in advice.

Greetings.

[mo0651]

Do they have Hard drives? Might try reformat. Maybe re- initialize network settings, and re-enter ip's.

[bonc]

No hard drives, and done network initialization, without any luck

Thank you for reply.

[ineo+6501]

I had this on a few 420 & 500. Changed the network speed to 100 full duplex and the problem went away

[bonc]

Thank you, will test this out!

[Woxner]

Last time I had this I had to replace the control pwb and nvram. I did both but I think it was the pwb. I had to change both because it came from another machine

[bonc]

Thank you for reply. In few hrs will check out first that network speed issue, then if it wont help (but i hope it will I will get out control pwb. One more time thanks for sugestions. Kind regards.

Changed network speed for 100mbps/full duplex but it didnt help, so next thing is control pwb