HP Laserjet IIIP will print test print but won't print from PC

HP LJ IIIP was turning itself off after a couple of minutes. I suspected and replaced the power supply. Printer now stays on. When powered on, it completes a self test sucessfully and displays no error messages. I can print a test print using the buttons on the front panel. The print looks fine. It says it is 'ready' and is 'online'. I cannot get it to print from my PC. I changed the cable and tried printing from another PC but still no print. Doing a 'print test page' from within the printer settings page in Windows doesn't work and it doesn't work with a wordpad file. I queues up but then errors. I was told that there is a 'reset' button under the back cover on the left. I pressed it and the printer does an 'engine test' and prints a page with a lot of vertical lines on it. Still won't print from the PC.
Who is Participating?
briancassinConnect With a Mentor Commented:
Does the cable you are using say IEEE1284 compliant on it and is it 10ft or less in length ?  If not then you need to replace the cable with one that says IEEE1284 compliant on it and that is no longer then 10ft.

This cable being incorrect would affect it on two different machines. Your printer requires an IEEE1284 compliant cable without it the printer will not work properly.

If you did the dir >lpt1 in dos and got nothing no error message or anything then it is a cable problem, port problem or you have had other printer software in the past loaded on the computers that you are testing this printer on and the drivers for those other printers are interfering.

Since it can do a self test print from the machine itself it is not the formatter board. However we have not ruled out yet that the port on the printer is bad or that the main board in the printer has gone bad....
trailblazzyr55Connect With a Mentor Commented:
No problem,

Got a couple questions though..
How do you have your printer connection to your computer? Is it a network printer or connected directly to your PC?
How is it connected? USB or Parallel or LAN?
Did your Printer come with a drivers Disk?
And what operating system are you running?

Lemme know and we'll get ya up in no time!
Sounds like the driver may be possibly corrupt ....

do this

I am assuming you are using windows but you never mentioned which version these instructions will cover win98,98se,xp,2000....
Reinstall the driver but prior to reinstalling it go to start run type msconfig and hit enter then go to the startup tab and on a piece of paper write down everything that is either checked or unchecked whichever is easier then uncheck everything. or select disable all (if available) then hit apply then ok then reboot. Once you are back in windows it will say you are in a diagnostic mode of windows ignore this message and continue on next uninstall the driver... reboot then install the correct driver then try to print again if you are still having problems please post the error messages you are getting and also if you could please tell us how the printer is connected as mentioned above by trailblazzyr55.

Also please let us know what your O.S. is

Cloud Class® Course: CompTIA Healthcare IT Tech

This course will help prep you to earn the CompTIA Healthcare IT Technician certification showing that you have the knowledge and skills needed to succeed in installing, managing, and troubleshooting IT systems in medical and clinical settings.

newberntechAuthor Commented:
The printer is connected via parallel cable. I am running windows xp-pro. I tried the printer on another pc that was running w98se also via parallel cable. That would seem to rule out the driver. The driver is the one supplied with the version of windows that I am running so changing pc's also would have changed the driver. As mentioned, I tried another cable.

As far as using msconfig, I went to a command prompt and did a dir>lpt1. No error reported and no print so I don't think it is a windows thing. Besides, I tried another PC.
newberntechAuthor Commented:
Thanks for the quick response.
Correct me if I'm wrong, but isn't the IEEE1284 a bidirectional cable. This printer has been around since before IEEE1284 was in place I believe. Anyway, the cable that I have been using (for years) isn't IEEE1284 so I don't think it is required for this printer since it is not bidirectional. I even tried a third cable but no print. I tried using the serial port but I'm not sure that that cable is good so it is really inconclusive. The job queued and then went away as if it printed (no error like when I print with the parallel) but no print. I also deleted the printer and readded it using a new driver. I also deleted the LPT1 and readded it. ALthough there is another printer attached to the machine, it is a usb printer and both have coexisted since last August so I con't see a conflict there. The second PC has only has the HP LJ IIIp printer driver installed and never any other (it is a laptop).

As I originally said, I replaced the power supply so the machine has been disassembled. The port board is firmly seated and screwed down as is everything else. I'm thinking that the port board is gone but don't know enough about it to test it or if it can be tested while in the printer.
newberntechAuthor Commented:
I guess I didn't say this but I've had the printer for years and it has worked fine until it started shutting itself off. I could print from both PCs using it. Then I changed the power supply and now it won't print. I really haven't changed anything on the PC side (that I know of).

Again, thanks.
newberntechAuthor Commented:
SOLVED IT!!!!!!!

In reading another forum, it was suggested that the user do a 'Cold Reset' to solve the problem that they had. I gave it a try and the printer works fine now. The cold reset is performed by holding the 'online' panel button down when turning on the printer. Worked.

Thanks to all for the attempts to help.
I will split the points for your assistance even though I fixed it myself.
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.