HP Laserjet 4050 Not Responding

Hello,
I just upgraded to Mavericks and my HP Laserjet 4050N is no longer connecting. I'm connecting via ethernet. I had previously set it up with these instructions:
https://discussions.apple.com/message/12054783#12054783
I tried doing this over again, but still no luck. I also tried resetting the printing system. I already regret upgrading to Mavericks. Thanks, Apple. Ugh.
Please help! This is a great printer and I don't want to be forced to get a new one. I've tried looking for a current driver but can't find one. If anyone has a solution I would really appreciate it.
Thanks,
Joe

Thanks for your help. I'm going to try this a bit later, but one other question.
I would set an IP address of 192.168.1.10 and a subnet mask of 255.255.255.0. Then on the Mac's Ethernet port, I would set an IP address of 192.168.1.5 and a subnet mask of 255.255.255.0.
Shouldn't the IP addresses be the same?

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Thanks for your help. I'm going to try this a bit later, but one other question.
I would set an IP address of 192.168.1.10 and a subnet mask of 255.255.255.0. Then on the Mac's Ethernet port, I would set an IP address of 192.168.1.5 and a subnet mask of 255.255.255.0.
Shouldn't the IP addresses be the same?

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Is your printer connected through a hub or directly to the computer?

Print to a Laserjet 4050 networked on an XP machine from my iPad

How can I print to a Laserjet 4050 networked on an XP machine from my iPad? Can I use the AIO app? does not find the printer. Thanks.

@Mojo-Risin
If I understand your question, you would like to use the AiO remote app on your iPad with your Laserjet 4050, correct? If this is case, unfortunately, the AiO remote app is not supported with the Laserjet 4050 and the iPad.
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Say Thanks by clicking the Kudos Star in the post that helped you.
Please mark the post that solves your problem as Accepted Solution

HP LaserJet P2015 not printing via network

Hi,
looking for help.
I cannot print via the network on HP LaserJet P2015. It works via USB. When I try to add the printer it is identificable by Bonjour (Nearest Printers). It tries to configure the printer and appears as being active (green dot) but when try to print it says Connecting to Printer but then reports an error message of The printer is not responding.
Any ideas on how can fix ? Thanks in advance !

You can connect to Bonjour printers in Mac OS X, just select the Printer in the Print & Fax preference pane as usual and click on Add

Printing on (older) HP Laserjet 4050 Series

Hi,
a friend oh mine has a very old (pre 2004) HP Laserjet 4050, which is still going strong, but has no USB port, just parallel and Ethernet with TCP/IP and IPX/SPX (yeah).
He connected it until now on Win XP + Vista using an USB to parallel adapter cable, and it worked.
However, this does not work any more with his newly acquired Mac Book pro and SL (10.6.4). The printer will be recognized at setup and the apropriate driver (HP Laserjet 4050) will be automatically selected. But then printing (1 page Word text, 1 page Adobe Reader) will not work.
On the Mac, it will say "sending data", but there will be no indication of that on the printer, and the sending will not end after 30 minutes.
I tried to configure the printer via Ethernet/TCP/IP over a switch, with nearly the same results. But I am not sure I configured everything needed, may be I averlooked someting more special. I am familiar with configuring home networks including servers, routers, Wifi access points, printers etc.
Does anyone have any idea? Is there any special configuration trick? Do I have to use the Gutenprint driver?
This message will be posted also in HP forums.
Thank you,
Andre

Yes, use Gutenprint - or try Generic PCL 5 or 6.
Try installing usbtb, a substitute USB, which seems to help when using USB-parallel cables:
http://buymelunch.org/printing/usbtb/
To help with network setup, we need more info, like is this through a router, not just a switch, and what IP address does the printer have - is it within the LAN's subnet? Are you using WiFi for internet and trying to add the printer by ethernet separately? etc.

HP Laserjet 4050 toner cartridge issue

I look after a laserjet 4050 printer for a company. They recently started using a new toner cartridge (higher quality) but they have started to have issues with black ink lines down one side of the paper. They have sent back toner cartridges (thinking them to be faulty) but cartridges are fine.
Is this a printer issue or is there an issue with the toner cartridge and the 4050 printer (not compatable)

I think I may have the solution to your problem. I do not think the toner is your problem here. From my experience i would suggest that your printer may need to be cleaned. I had a client who had a similar problem with his printer, what you should try doing is the following:
If toner specks appear on the front or back side of your print jobs, follow the procedure below to clean the paper path.
Using the printer cleaning page
From the printer’s control panel, do the following:
Press MENU until "Print Quality Menu" appears.
Press ITEM until "Create Cleaning Page" appears.
Press SELECT to create the cleaning page.
Follow the instructions on the cleaning page to complete the cleaning process.
NOTE: In order for the cleaning page to work properly, print the page on copier grade paper (not bond or rough paper).
You might need to create a cleaning page more than once. When toner has been cleaned from inside the printer, shiny black spots will appear on the page’s black strip.
To ensure good print quality with certain types of paper, use the cleaning page every time that the print cartridge is replaced.
I am confident that your toner should print clear pages after this.
(Removed items in coflict with Terms of Service (n).)
Message Edited by SandyD on 06-06-2009 12:29 PM

Officejet Pro 8600 touch screen will not respond

Hi,
I have the HP Officejet Pro 8600 and the touch pad will not turn on. The power is on! I actualy cannot turn it off by pressing the off button, even when I unplug it and plug it back in it is like it was never unplugged. This all started when I updated my MAC to the new operating system and then I noticed where the paper comes out there were blue blinking lights. I pressed the off button and the lights stopped, but now nothing will respond. This is a wireless printer. Please advise what to do.
Thank you,
Tanya (Personal information removed)

Hello Tanyaward,
Welcome to the HP Forums.
I see that you are having an issue with the touch pad not responding or lighting up.
First off, please make sure that you have the printer power cable connected directly to a wall outlet and not a power bar/strip. Here is a document that uses a LaserJet printer as an example but it is meant for HP products in general. Please click on the following link that explains the Issues when Connected to an Uninterruptible Power Supply/Power Strip/Surge Protector.
Once the printer is connected to a wall outlet, please attempt to use the power button to turn the unit off and then back on again. This will do a semi reset on the unit.
If the troubleshooting does not help resolve your issue, I would then suggest calling HP's Technical Support to see about further options for you. If you are calling within North America, the number is 1-800-474-6836 and for all other regions, click here: click here.
Thanks for your time.
Cheers,
Click the “Kudos Thumbs Up" at the bottom of this post to say “Thanks” for helping!
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
W a t e r b o y 71
I work on behalf of HP

Problem installing Laserjet 4050 in Windows 7 x64, No driver in Universal Print Driver v5.0.3

I have just installed Windows 7 64Bit operating system. I have be successful in installing several other more recent HP printers in the office. However, my main "workhorse" printer is a HP Laserjet 4050 and I have downloaded the Universal Printer Driver v5.0.3 for Windows x64 - PCL 5 and PCL 6, and in both cases it does not find a suitable driver. The HP download site states these Universal Drivers will work, but I cannot get it to install.
Is there a driver that will work on the 4050 in Windows 7 X64? Thanks everyone.

You're probably getting the "Windows cannot locate a suitable printer driver" error if you're trying to add the driver while adding a printer that is shared over the network. You see, HP's Universal Printer Driver (UPD) doesn't contain the PnpIDs of every printers it supports, so when you specify HP's UPD as the drivers for the network printer, if Windows can't find a match for the printer's PnpID it spits out the driver isn't compatible.
The way to overcome this is to install a "generic" printer locally, using HP's UP driver, and change the port afterwards to point to the shared printer. So, first, add a local printer (that will be using the LPT1 port - make sure no printer is attached!), and click on "Have disk(s)" to browse to and select HP's UPD. Going through the remaining steps should install a locally-attached printer named something like "HP Universal Printing PCL 5" (or "[..] PCL 6"). You'll then go in the new printer's properties, on the "Ports" tab, and click on "Add Port...". If you're installing a shared printer, you'll select "Local Port", click on "New Port..." and specify the path to the printer (e.g. \\myserver\hplaserj) as the port name. Those steps should do the trick.
Last thing: beware, though, as HP's UPD PCL 6 might not be compatible (anymore) with your LaserJet 4050, as they use a PCL XL class number/revision (class 2.1; sort of a version number of the protocol) that is higher than what your printer's firmware might support for PCL6 (should be class 2.0) I know the latest versions of HP's UPD PCL 6 doesn't work with our LJ 4000 & 4050 printers, so you might have to use the PCL5e driver for those 64-bit workstations.
Background info:
PCL XL error on Laserjet 4550n with PCL 6 driver [IT Resource Center Forums]
Universal Print Driver PCL6 broken on LaserJet 4000 [IT Resource Center Forums]
Printer Command Language [Wikipedia]
Let us know if it works.

Setup Laserjet 4050 with Parallel to USB cable on new computer (win 8.1)

I am trying to setup my old Laserjet 4050 on my new Windows 8.1 (64bit) computer. I have gotten a parallel to USB cable and tried to download the latest drivers but the it is not identifing the printer (doesn't show up in the "printers" section of the control pannel). Help - any suggestions as to how to get it set up would be appreciated. I love this printer (it has worked for 6 years without a problem).

Plug the ethernet cable into the jet direct card and the other end into the router. Now turn on the printer while holding down the green button until you see cold reset in the display and release the green button. When the printer comes to ready, wait about 2 minutes and then go to the information menu on the printer and print a configuration page. You will get 2 pages with the second page being the network settings. You use the ip address it found to load the printer on the computer. You will go to add printer, next, local printer, next and at the bottom will be a create port item. Click on it and in the drop down choose standard tcp/ip printer and then follow the prompts on the screen. When you get to the makers page choose hp on the left and then any laserjet pcl5 or postscript driver and finish up and it should work. Good Luck.

Lost Printer Features Pane for HP LaserJet 4050 and Color LaserJet 4550

Hello,
I am trying to restore the Printer Features Pane for 2 different Hewlett-Packard printers we have connected to our LAN.
The Printers Features Pane is available on several of our older iMacs but NOT several of the newest iMacs just recently installed.
After doing some reading in the discussion forum I thought this was due to an erroneous PPD file and replaced both PPD files on the new iMac (with the absent Printer Feature Pane) with the PPD files copied from the old iMac (with the correctly functioning Printer Feature Pane) . I actually copied the PPD files into both of the following locations:
• /Library/Printers/PPDs/Contents/Resources/en.lproj
• /System/Library/Printers/PPDs/Contents/Resources/en.lproj
Unfortunately this did not work even when i deleted the old printer, replaced the old PPD files with the new ones (actually replaced the new ones with the older ones from the previous iMacs on which the Printer Features Pane was working as anticipated), restarted the machine and then added the printer selecting the correct PPD file. All machines are running X.4.10
I am sure this is a simple fix that i am just overlooking but really need to get back the option of printing to the "Letterhead" tray of our printers.
Any suggestions are appreciated.
Thanks
Mike

Paul,
Below is the best I can do to portray the visual appearance of the print dialog boxes for
Computers that DON'T provide the Printer Features option:
...............................Print
Printer: HP LaserJet 4050 Series
Presets: Standard
Menu Options: Copies & Pages
........................Layout
........................Scheduler
........................Paper Handling
........................ColorSync
........................Cover Page
........................Error Handling
........................Paper Feed
........................Summary
and for
Computers that do provide the Printer Features Option:
...............................Print
Printer: HP LaserJet 4050 Series
Presets: Standard
Menu Options: Copies & Pages
........................Layout
........................Scheduler
........................Paper Handling
........................ColorSync
........................Cover Page
........................Error Handling
........................Paper Feed
........................Finishing
........................Image Quality
........................Printer Features
........................Summary
and for
Computers that do provide the Printer Features Option
After selecting Printer Features from the pull down menu:
...............................Print
Printer: HP LaserJet 4050 Series
Presets: Standard
...............................Printer Features
Media Type: None
....................Plain
....................Preprinted
....................Letterhead
....................Transparency
....................Prepunched
....................Labels
....................Bond
....................Recycled
....................Color
....................Rough
....................Card_Stock
I wish I could attach some screen shots as they are usually my best way to convey the visual appearance of the interface. But hopefully the information above will suffice.
The following is an extract from the PPD for the LaserJet 4050 (same file on both machines that display and don't display a printer features option) that appears to be the salient area of the file for dealing with this functionality. :
*%==========================================
*% Media Type
*%=========================================
*OpenUI *MediaType/Media Type: PickOne
*OrderDependency: 20 AnySetup *MediaType
*DefaultMediaType: None
*MediaType None/None: "
<</MediaType null>> setpagedevice"
*End
*MediaType Plain/Plain: "
<</MediaType (Plain)>> setpagedevice"
*End
*MediaType Preprinted/Preprinted: "
<</MediaType (Preprinted)>> setpagedevice"
*End
*MediaType Letterhead/Letterhead: "
<</MediaType (Letterhead)>> setpagedevice"
*End
*MediaType Transparency/Transparency: "
<</MediaType (Transparency)>> setpagedevice"
*End
*MediaType Prepunched/Prepunched: "
<</MediaType (Prepunched)>> setpagedevice"
*End
*MediaType Labels/Labels: "
<</MediaType (Labels)>> setpagedevice"
*End
*MediaType Bond/Bond: "
<</MediaType (Bond)>> setpagedevice"
*End
*MediaType Recycled/Recycled: "
<</MediaType (Recycled)>> setpagedevice"
*End
*MediaType Color/Color: "
<</MediaType (Color)>> setpagedevice"
*End
*MediaType Rough/Rough: "
<</MediaType (Rough)>> setpagedevice"
*End
*MediaType CardStock/CardStock: "
<</MediaType (Card Stock)>> setpagedevice"
*End
*?MediaType: "
save
currentpagedevice /InputAttributes get dup
/Priority get
0 get get
/MediaType get
(Card Stock) anchorsearch
{pop pop (Card_Stock)} if
= flush
restore
*End
*CloseUI: *MediaType
I don't know if it helps you to know that the Printer Features option did work on my current G5 tower, but following an erase and install that functionality has been lost.
Thanks for your ongoing assistance with this problem.
Mike

Ibook/G3/OSX.4 (tiger) and HP LaserJet 4050 ethernet (no USB) printer

hi everyone, i spent forever on the HP site and HP phone trying to get support but got nowhere. someone gave me an HP LaserJet 4050 printer. It has a serial port, a parallel port and an ethernet cable port. I have an ibook with USB, firewire, and ethernet. i have no instructions for the printer (it's old school). i downloaded the driver from HP but nothings happening. I can't figure out how to configure this printer to work with my mac. It may be impossible. It seems to be a network printer as there is an IP address on the printer. The only way I can connect is thru the ethernet cable. Are there any work-arounds?
Thanks,
Amy

That printer (discontinued 2001?) may not support IPP (= Internet Printing Protocol, not IP printing). If it does it will need a queue name to work with a jetdirect card (ethernet card).
IP printing > HP jetdirect protocol is better for HP jetdirects.
To change settings on the printer, use the Classic (OS 9) HP Laserjet utility, bundled in OS 9 Laserjet driver installers, or use OS X Terminal command "telnet 192.168.x.x" (printer's IP address).

Logic Not Responding

Hi Folks,
Yesterday, my MacBook Pro was acting slow, so I went to one of the other Support Forums and got some advice how to improve things. Today, Logic Pro X is not responding. It was fine prior to the fixes tried, yesterday. I'm wondering if you folks have any ideas why this might be happening?
A few of the things done yesterday, include:
1. Backing Up all my applications
2. Uninstalling Google Chrome and disabling Google Drive
3. Taking Dropbox out of my LogIn items
4. System Pref>Mission Control>uncheck "Displays have separate surfaces"
Here's what happens when I try to start Logic X:
After the initial screen appears with the Logic X name and it runs through its set-up tasks, a dialog box appears asking what existing project (or new) I want to open. I've tried both, but neither action leads to the app opening for use.
Here's what's transpiring in the Console:
8/6/14 3:18:42.518 PM Logic Pro X[484]: Error loading /Library/Audio/Plug-Ins/HAL/DVCPROHDAudio.plugin/Contents/MacOS/DVCPROHDAudio: dlopen(/Library/Audio/Plug-Ins/HAL/DVCPROHDAudio.plugin/Contents/MacOS/DVCPROHD Audio, 262): no suitable image found. Did find:
/Library/Audio/Plug-Ins/HAL/DVCPROHDAudio.plugin/Contents/MacOS/DVCPROHDAudio: no matching architecture in universal wrapper
8/6/14 3:18:42.519 PM Logic Pro X[484]: Cannot find function pointer NewPlugIn for factory C5A4CE5B-0BB8-11D8-9D75-0003939615B6 in CFBundle/CFPlugIn 0x7fcca9533f10 </Library/Audio/Plug-Ins/HAL/DVCPROHDAudio.plugin> (bundle, not loaded)
8/6/14 3:18:46.757 PM MIDIServer[497]: 15:18:46.753 NOTE:      [0x7fff7ec27310] MIDIServer.cpp:353: FullInit: MIDIServer [497] starting; arch=x86_64
8/6/14 3:19:59.453 PM mds[36]: (Warning) Volume: vsd:0x7fd741959000 Open failed. failureCount:5 {
    DisabledRecycleCount = 5;

Just in case this helps:
EtreCheck version: 1.9.12 (48)
Report generated August 6, 2014 at 3:39:29 PM EDT
Hardware Information:
MacBook Pro (15-inch Early 2008) (Verified)
MacBook Pro - model: MacBookPro4,1
1 2.4 GHz Intel Core 2 Duo CPU: 2 cores
4 GB RAM
Video Information:
GeForce 8600M GT     - VRAM: 256 MB
SMB2430H 1920 x 1080 @ 60 Hz
System Software:
OS X 10.9.4 (13E28) - Uptime: 0 days 0:30:46
Disk Information:
ST9750422AS disk0 : (750.16 GB)
EFI (disk0s1) <not mounted>: 209.7 MB
Central Command (disk0s2) / [Startup]: 749.3 GB (208.72 GB free)
Recovery HD (disk0s3) <not mounted>: 650 MB
USB Information:
Apple Inc. Built-in iSight
Apple, Inc. Keyboard Hub
Kensington      Kensington Expert Mouse
Apple, Inc Apple Keyboard
Hewlett-Packard HP Color LaserJet 3600
M-Audio USB O2
Logitech USB Receiver
Akai Akai MPD18
hewlett packard hp scanjet
Apple, Inc. Apple Internal Keyboard / Trackpad
Apple Computer, Inc. IR Receiver
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
FireWire Information:
Glyph Tech OEM ATA Device 00 400mbit - 800mbit max
disk1s1 (disk1s1) <not mounted>: 32 KB
Logical (disk1s3) /Volumes/Logical: 166.7 GB (52.19 GB free)
Illogical (disk1s5) /Volumes/Illogical: 166.7 GB (164.92 GB free)
Bierkoville (disk1s7) /Volumes/Bierkoville: 166.7 GB (150.52 GB free)
Sound Off! (disk1s9) /Volumes/Sound Off!: 166.7 GB (100.53 GB free)
Videoodeeo (disk1s11) /Volumes/Videoodeeo: 166.7 GB (77.22 GB free)
What's Left? (disk1s13) /Volumes/What's Left?: 165.9 GB (110.71 GB free)
Focusrite SAFFIRE_PRO_40 400mbit - 400mbit max
Gatekeeper:
Mac App Store and identified developers
Kernel Extensions:
[loaded] com.kensington.trackballworks.driver (1.1.0) Support
[not loaded] com.paceap.kext.pacesupport.leopard (5.9 - SDK 10.4) Support
[not loaded] com.paceap.kext.pacesupport.master (5.9 - SDK 10.6) Support
[not loaded] com.paceap.kext.pacesupport.panther (5.9 - SDK 10.3) Support
[loaded] com.paceap.kext.pacesupport.snowleopard (5.9 - SDK 10.6) Support
[not loaded] com.paceap.kext.pacesupport.tiger (5.9 - SDK 10.4) Support
[not loaded] com.roxio.BluRaySupport (1.1.6) Support
[not loaded] com.roxio.TDIXController (2.0) Support
[loaded] tc.tctechnologies.driver.Saffire (4.1.3 17357 - SDK 10.6) Support
Launch Daemons:
[loaded] com.adobe.fpsaud.plist Support
[loaded] com.adobe.SwitchBoard.plist Support
[failed] com.autodesk.backburner_manager.plist Support
[failed] com.autodesk.backburner_server.plist Support
[loaded] com.autodesk.backburner_start.plist Support
[loaded] com.bombich.ccc.plist Support
[loaded] com.google.keystone.daemon.plist Support
[loaded] com.microsoft.office.licensing.helper.plist Support
[invalid] com.oracle.java.Helper-Tool.plist
[running] com.paceap.eden.licensed.plist Support
[loaded] com.sharpcast.xfsmond.plist Support
[loaded] PACESupport.plist Support
[loaded] tc.tctechnologies.Saffire.plist Support
Launch Agents:
[not loaded] com.adobe.AAM.Updater-1.0.plist Support
[loaded] com.adobe.CS4ServiceManager.plist Support
[loaded] com.google.keystone.agent.plist Support
[invalid] com.oracle.java.Java-Updater.plist
User Launch Agents:
[loaded] com.adobe.AAM.Updater-1.0.plist Support
[loaded] com.adobe.ARM.[...].plist Support
[running] com.akamai.single-user-client.plist Support
[loaded] com.facebook.videochat.[redacted].plist Support
[not loaded] com.spotify.webhelper.plist Support
User Login Items:
iTunesHelper
Path Finder
SugarSync
Internet Plug-ins:
JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Check version
FlashPlayer-10.6: Version: 14.0.0.145 - SDK 10.6 Support
Default Browser: Version: 537 - SDK 10.9
AdobePDFViewerNPAPI: Version: 10.1.10 Support
AdobePDFViewer: Version: 10.1.10 Support
Flash Player: Version: 14.0.0.145 - SDK 10.6 Support
QuickTime Plugin: Version: 7.7.3
SharePointBrowserPlugin: Version: 14.1.0 Support
iLokClientHelper: Version: 3.6 - SDK 10.5 Support
iPhotoPhotocast: Version: 7.0 - SDK 10.8
Safari Extensions:
Dashlane: Version: 3.0.0.68522
AdBlock: Version: 2.7.10
Audio Plug-ins:
BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
AirPlay: Version: 2.0 - SDK 10.9
AppleAVBAudio: Version: 203.2 - SDK 10.9
iSightAudio: Version: 7.7.3 - SDK 10.9
iTunes Plug-ins:
Quartz Composer Visualizer: Version: 1.4 - SDK 10.9
User Internet Plug-ins:
CitrixOnlineWebDeploymentPlugin: Version: 1.0.105 Support
Dashlane: Version: Dashlane 1.0.0 - SDK 10.7 Support
3rd Party Preference Panes:
Akamai NetSession Preferences Support
Flash Player Support
FUSE for OS X (OSXFUSE) Support
TrackballWorks Support
Time Machine:
Mobile backups: OFF
Auto backup: NO - Auto backup turned off
Time Machine not configured!
Top Processes by CPU:
      2% WindowServer
      0% P72E3GC48.com.dashlane.DashlaneAgent
      0% fontd
      0% WebKitPluginHost
      0% Safari
Top Processes by Memory:
197 MB Safari
188 MB com.apple.IconServicesAgent
94 MB WebKitPluginHost
86 MB com.apple.quicklook.satellite
78 MB mds_stores
Virtual Memory Information:
1.54 GB Free RAM
1.66 GB Active RAM
285 MB Inactive RAM
532 MB Wired RAM
434 MB Page-ins
0 B Page-outs

I can't open firefox the running but not responding window opens and says to close the existing window. I can't do that shutting down the computer doesn't do anything to help. I've done all the suggestions here. I've uninstalled and reinstalled firefox

Firefox will not open. I get the firefox is already running but not responding window... I have tried rebooting with no help. I have tried to end the process via cntrl+shift+esc and nothing firefox is listed to end. I have tried find the app data via the run icon in the start up window, I have no run icon on this system (Acer with windows vista(?)
== This happened ==
Every time Firefox opened
== The computer was hard shut down and did a improper shut down scan when it was restarted ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; FunWebProducts; GTB6.5; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729)

I am having a similar problem. Running Xp.
Latest revision of firefox.
After using firefox for a while if I exit, parent.lock is locked and i have to reboot to reload firefox.
I have killed all firefox applications from task manager (usually there are none). and I have tried 3 different "file unlock" programs including unlocker to no avail.
I also recently installed a program that shows -all- open files, and parent.lock is not listed, and thus not closable/unlockable from there.

Frequently when I open Firefox it says Firefox is already running but is not responding. I have to go to the task manager, find Firefox and close the process before I can get firefox to load.

Those are all the details I have

There is an article about this problem see:
* [[Firefox is already running but is not responding]]

HP Laserjet 4050 Not Responding

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