How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Russell H. Your Own Question

Russell H.
Russell H., Computer System Tech
Category: Computer
Satisfied Customers: 9536
Experience:  11 years experience
13568747
Type Your Computer Question Here...
Russell H. is online now

Samsung Printer SCX 3400 does not print - error message

Customer Question

Samsung Printer SCX 3400
does not print - error message says check the LSU.
What do I do? Thanks!
Submitted: 9 months ago.
Category: Computer
Expert:  Russell H. replied 9 months ago.
Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question. I'm sorry to say that, if not hopeless, this is at any rate a case with some grave possible outcomes. The LSU is the laser scanning unit. It is the 'laser unit' in other words, inside which the laser beam is emitted and the polygon motor and the spinning mirror are contained. The warning about the LSU, means you may have toner / dirt / dust upon the glass surface on the exterior of the laser unit. This glass surface is also known simply as the 'window'. Turn Off the printer. Unplug it from the power. Open it up and find the 'window' on the laser unit... the laser unit always has a large warning emblem on it, which basically says, "Here's the laser beam emitter... be sure to unplug the printer for a while before opening it to this region, since the laser beam is powerful enough to damage eyesight. Unplugging the printer makes quite sure it won't be active, not even slightly."That warning label should help identify it.Clean the glass 'window' on the laser unit, with a clean, dry, lint-free rag cloth, by wiping it fairly firmly.Close up, plug in, turn On, see how it goes.
Customer: replied 9 months ago.
Oh MY! ok thanks -I will do this
Customer: replied 9 months ago.
or leven that the unit was unplugged from power while being connected to the mac.The paper comes out blank --
Expert:  Russell H. replied 9 months ago.
You may have to reinstall the driver on your computer. Other things may be wrong, instead, or also. Did you put all components back properly? did you by chance wipe the gleaming metallic 'drum' surface? if so, that's a grave mistake, and has ruined the drum.
Customer: replied 9 months ago.
I only wiped the flat surface where the paper goes. I couldn't find what you were referido to. So I couldn't open it either. I'll try to re-install.
Expert:  Russell H. replied 9 months ago.
1. unplug the printer from the computer2. go to the printer's list, select the printer, then delete it with the - button.3. restart the computer4. add the printer back in to the printer's list.
Customer: replied 9 months ago.
ok
Customer: replied 9 months ago.
did all that - the paper feeds fine but no print.
Expert:  Russell H. replied 9 months ago.
Did the error code go away? Did you go through all 4 steps I recommended?
Customer: replied 9 months ago.
yes - there is no error code. The paper feeds through as it should but no printing ocurre
Customer: replied 9 months ago.
Toner is 50%
Customer: replied 9 months ago.
any other ideas?
Customer: replied 9 months ago.
thanks anyway - have to go from the desktop now. Will check later
Adrienne
Expert:  Russell H. replied 9 months ago.
Can you do any sort of self-test, or Configuration, page from the printer itself alone, as opposed to from your computer ? if so, please try that and tell me what result you get. Also, open the printer again. Look for the shiny bluish-metallic-looking, 'drum'. The 'window' should be near the 'drum'. The window is just a sheet of clear glass on the side of a laser unit, and it faces toward the shiny bluish 'drum'.

What Customers are Saying:

 
 
 
  • My Expert answered my question promptly and he resolved the issue totally. This is a great service. I am so glad I found it I will definitely use the service again if needed. One Happy Customer
< Previous | Next >
  • My Expert answered my question promptly and he resolved the issue totally. This is a great service. I am so glad I found it I will definitely use the service again if needed. One Happy Customer
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
 
 
 

Meet The Experts:

 
 
 
  • Kamil Anwar

    Kamil Anwar

    Computer Support Specialist

    Satisfied Customers:

    143
    8+ Years of Experience. / CCNA (S), CCNA (W), CCNA (RS), MCTS, MBCs.
< Last | Next >
  • http://ww2.justanswer.com/uploads/JA/JACUSTOMERf8udkdxk/2013-8-3_15150_323738101505074393259301621172992o.64x64.jpg Kamil Anwar's Avatar

    Kamil Anwar

    Computer Support Specialist

    Satisfied Customers:

    143
    8+ Years of Experience. / CCNA (S), CCNA (W), CCNA (RS), MCTS, MBCs.
  • http://ww2.justanswer.com/uploads/WI/Windowspcfix/2013-8-19_153826_ja12.64x64.jpg James K.'s Avatar

    James K.

    Consultant

    Satisfied Customers:

    93
    Technical Director of IT Company
  • http://ww2.justanswer.com/uploads/JO/JonTech/2011-10-25_111835_A2c.64x64.jpg Jon-Tech's Avatar

    Jon-Tech

    IS Manager

    Satisfied Customers:

    61
    20 yrs: Computers, Networking
  • http://ww2.justanswer.com/uploads/MI/mikew4950/2011-12-26_1606_mikephoto2s.64x64.jpg MikeW's Avatar

    MikeW

    Computer Engineer

    Satisfied Customers:

    49
    32+ years Computer and Networking Experience
  • http://ww2.justanswer.com/uploads/JA/jamieratliff/2012-2-8_194551_jamie.64x64.jpg jamieratliff's Avatar

    jamieratliff

    Information Systems Manager

    Satisfied Customers:

    21
    Jamie has worked in the Information Technology field for over a decade.
  • http://ww2.justanswer.com/uploads/JA/JACUSTOMERleg4q7o8/2012-3-6_203036_meja.64x64.png TheDoctor's Avatar

    TheDoctor

    Software Engineer

    Satisfied Customers:

    16
    Experienced Software Engineer
  • http://ww2.justanswer.com/uploads/FI/FisherEngineering/2012-1-18_194422_Fisher375Headshotcompressed239K.64x64.jpg Bill Fisher's Avatar

    Bill Fisher

    Computer Engineer

    Satisfied Customers:

    1
    Computer system design, networks, integration, general support.
 
 
 

Related Computer Questions