Looked on d-link website and found dp-300u manual. the manual explained that 13 quick blinks + 1 long blink following a self-test on power-on indicates error with lpt 2 port. all connections remained the same pre-reboot (when printers connected to the server and the server intself were working fine) and post-reboot (when the problem started and persists)
SOURCE: Forgotted the Ip of D-Link DP 300U print server
You may use the PSAdmin software to configure your print server even if you don't know the IP address. The only requirement is that the DP-300U has to be in the same network (subnet) as your PC running PSAdmin. In the PSAdmin, you will then be able to view or change the IP address.
Here is the link to download PSAdmin:
http://support.dlink.com/products/view.asp?productid=DP%2D300U#apps
Remember that if you also have forgotten the Admin password, you will have to ship the unit to D-Link in order to have it factory reset.
SOURCE: hp 1020 dp-300u
I have one of theses D-Link PD-301U. It does NOT support a printer like yours. According to D-Link's Web site, here are the HP Laser printers it supports (note the P1020 is NOT in the list):
LaserJet
http://support.dlink.com/faq/view.asp?prod_id=2135&question=DP-300U%20/%20DP-301P+%20/%20DP-301U%20/%20DP-311U%20/%20DP-G310%20/%20DP-G321
SOURCE: Printer (Brother HL-5140 laser)just quit working.
Your usb cable is bad, easy fix.
Testimonial: "Thanks it was the Ethernet cable gong to the server."
SOURCE: FORGOTTEN PASSWORD IN DP 300U HOW RO RECOVER OR
Try this; it worked for my DP-300U.
username: psadmin
password: SYSXXXX (Where XXXX is the last four digits of the MAC address, which can seen on the underside of the server)
I learned this from http://www.fixya.com/support/t224263-dp301p_psadmin_password_forgoten. On that post
viaujoc also suggests a way of extracting the forgotten password from a configuation backup file.
SOURCE: hi , please i have forgot my password Dlink dp 300u ,can you help me please?
Try using the psadmin software to do a factory reset. If it demands a password to do this, try using "SYSxxxx" (where xxxx stands for the last four digits of the MAC address written on the underside of the server. If you don't have the psadmin software you may be able to download it off the internet. After doing the reset you will need to follow the Quick Install Guide to set up the server. If you lost the Quick Install Guide you can download a new one from D-link's website. The following link may also be helpful: http://www.fixya.com/support/t224263-dp301p_psadmin_password_forgoten
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