I have replaced the control board with a new 6871QCH060Q board and the vertical red stripe is no longer a problem. I now have horizontal streaks and the screen flickers mirror images that seem to cause momentary screen blackouts. I have reseated the ribbon cables several times but the problem refuses to go away. The fact that the circuits become confused as to right and left seems to me should be telling as to where the problem lies. Can anybody point me to a specific cause?

Print Head Alignment For Canon printer For more details visit this website: https://www.errorsdoc.com/canon/

Open the printer driver setup window.
Click Custom Settings on the Maintenance tab.
The Custom Settings dialog box opens.
Switch head alignment to manual.
Check the Align heads manually check box.
Apply the settings.
Click OK and when the confirmation message appears, click OK.
Click Print Head Alignment on the Maintenance tab.
The Start Print Head Alignment dialog box opens.
Load paper in the machine.
Load three sheets of A4 size or Letter size plain paper into the rear tray.
Execute head alignment.
Make sure that the machine is on and click Align Print Head.
Follow the instruction in the message.
Check the printed pattern.
Enter the numbers of the patterns with the least amount of streaks in the associated boxes.
Even if the patterns with the least amount of streaks are clicked in the preview window, their numbers are automatically entered in the associated boxes.
When you have entered all the necessary values, click OK.
Note:
If it is difficult to pick the best pattern, pick the setting that produces the least noticeable vertical streaks.
(A) Least noticeable vertical streaks
(B) Most noticeable vertical streaks
If it is difficult to pick the best pattern, pick the setting that produces the least noticeable horizontal streaks.
(A) Least noticeable horizontal streaks
(B) Most noticeable horizontal streaks
Confirm the displayed message and click OK.
The second pattern is printed.
Check the printed pattern.
Enter the numbers of the patterns with the least amount of streaks in the associated boxes.
Even if the patterns with the least amount of streaks are clicked in the preview window, their numbers are automatically entered in the associated boxes.
When you have entered all the necessary values, click OK.
Note:
If it is difficult to pick the best pattern, pick the setting that produces the least noticeable vertical streaks.
(A) Least noticeable vertical streaks
(B) Most noticeable vertical streaks
Confirm the displayed message and click OK.
The third pattern is printed.
Check the printed pattern.
Enter the numbers of the patterns with the least noticeable horizontal stripes in the associated boxes.
Even if the patterns with the least noticeable horizontal stripes are clicked in the preview window, their numbers are automatically entered in the associated boxes.

1. Open the printer driver setup window
2. Click Custom Settings on the Maintenance tabThe Custom Settings dialog box opens.
3. Switch head alignment to manual
   Check the Align heads manually check box.
4. Apply the settings
   Click OK and when the confirmation message appears, click OK.
5. Click Print Head Alignment on the Maintenance tab
   The Start Print Head Alignment dialog box opens.
6. Load paper in the machine
   Load three sheets of A4 size or Letter size plain paper into the front tray.
7. Execute head alignment
   Make sure that the machine is on and click Align Print Head.
   Follow the instruction in the message.
8. Check the printed pattern
   Enter the numbers of the patterns with the least amount of streaks in the associated boxes.
   Even if the patterns with the least amount of streaks are clicked in the preview window, their numbers are automatically entered in the associated boxes.
   
   When you have entered all the necessary values, click OK.
   [img src="http://ugp01.c-ij.com/ij/webmanual/PrinterDriver/W/MX450%20series/1.0/EN/PPG/images/i_note.gif" alt="" >Note
   • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable vertical streaks.
     (A) Least noticeable vertical streaks
     (B) Most noticeable vertical streaks
   • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable horizontal streaks.
     
     (A) Least noticeable horizontal streaks
     (B) Most noticeable horizontal streaks
9. Confirm the displayed message and click OK
   The second pattern is printed.
10. Check the printed pattern
    Enter the numbers of the patterns with the least amount of streaks in the associated boxes.
    Even if the patterns with the least amount of streaks are clicked in the preview window, their numbers are automatically entered in the associated boxes.
    
    When you have entered all the necessary values, click OK.
    [img src="http://ugp01.c-ij.com/ij/webmanual/PrinterDriver/W/MX450%20series/1.0/EN/PPG/images/i_note.gif" alt="" >Note
    • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable vertical streaks.
      (A) Least noticeable vertical streaks
      (B) Most noticeable vertical streaks
11. Confirm the displayed message and click OK
    The third pattern is printed.
12. Check the printed pattern
    Enter the numbers of the patterns with the least noticeable horizontal stripes in the associated boxes.
    Even if the patterns with the least noticeable horizontal stripes are clicked in the preview window, their numbers are automatically entered in the associated boxes.
    
    When you have entered all the necessary values, click OK.
    [img src="http://ugp01.c-ij.com/ij/webmanual/PrinterDriver/W/MX450%20series/1.0/EN/PPG/images/i_note.gif" alt="" >Note
    • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable horizontal stripes.
      (A) Least noticeable horizontal stripes
      (B) Most noticeable horizontal stripes
      

The manual on page 122 says:
Vertical streaks appear when you are shooting a very bright subject. Cause / Solution : The smear phenomenon is occurring. This phenomenon is not a malfunction.
So when you are photographing in bad light, and some where in the frame is a bright light, from that light, white vertical strips can occur.
But you mention Horizontal lines. If this happens in normal light, outside, or in every light condition, something else must be wrong.
I wonder if bringing a 10 year old camera to a repair store or Sony service centre is worth doing.

IF the stripes are on the pic and not in the monitor, your CCD is failing. It is made of many horizontal and vertical traces, the Vertical traces usually go and are a thin red line. If the lines are fatter than 1 pixel, then your CCD is exhibiting moisture ingress that is common with this camera and it is not repairable due to parts no longer made unless you want to replace the CCD chip on the daughterboard yourself.

Issue: How do I align the print head?
Solution: Perform a Print Head Alignment (Windows)- MX340

Aligning the Print Head Position Print head alignment corrects the installation positions of the print head and improves deviated colors and lines. The procedure for performing print head alignment is as follows:

Print Head Alignment

1. Open the printer driver setup window
   • In Windows Vista, select the Start menu -> Control Panel -> Hardware and Sound -> Printers.
     
     
   • In Windows XP, select the Start menu -> Control Panel -> Printers and Other Hardware -> Printers and Faxes.
     
     
   • In Windows 2000, select the Start menu -> Settings -> Printers.
     
     
     
2. Right-click your model name icon, and then select Printing Preferences from the displayed menu.
   
   The printer driver setup window appears.
   
   
3. Click Custom Settings on the Maintenance tab.
   The Custom Settings dialog box opens.
   
   
4. Check the Align heads manually check box.
   
   
5. Click Send, and click OK when the confirmation message appears.
   
   
6. Click Print Head Alignment on the Maintenance tab The Start Print Head Alignment dialog box opens.
   
   
   
   
7. Load three sheets of A4 size or Letter size plain paper into the rear tray (3).
   
   
   
   
8. Execute head alignment Make sure that the machine is on and click Align Print Head.
   Follow the instruction in the message.
   
   
9. Check the printed pattern
   Enter the numbers of the patterns with the least amount of streaks in the associated boxes.
   Clicking the patterns with the least amount of streaks in the preview window, will automatically set their numbers in the associated boxes.
   
   
   
   
10. When you have entered all the necessary values, click OK.
    
    Note:
    • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable vertical white streaks.
      
      
      (A) Less noticeable vertical white streaks
      (B) More noticeable vertical white streaks
      
      
    • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable horizontal white streaks.
      
      
      (A) Less noticeable horizontal white streaks
      (B) More noticeable horizontal white streaks
      
      
11. Confirm the displayed message and click OK.
    The second pattern is printed.
    Important: Do not open the Scanning Unit (Cover) while printing is in progress.
    
    
12. Check the printed pattern
    Enter the numbers of the patterns with the least amount of streaks in the associated boxes.
    Clicking the patterns with the least amount of streaks in the preview window, will automatically set their numbers in the associated boxes.
    
    
    
    
13. When you have entered all the necessary values, click OK.
    
    Note:
    
    • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable vertical white streaks.
      
      
      (A) Less noticeable vertical white streaks
      (B) More noticeable vertical white streaks
      
      
      
14. Confirm the displayed message and click OK.
    The third pattern is printed.
    Important: Do not open the Scanning Unit (Cover) while printing is in progress.
    
    
15. Check the printed pattern
    Enter the numbers of the patterns with the least noticeable horizontal stripes in the associated boxes.
    Clicking the patterns with the least noticeable horizontal stripes in the preview window, will automatically set their numbers in the associated boxes.
    
    
    
    
16. When you have entered all the necessary values, click OK.
    
    Note:
    
    • If it is difficult to pick the best pattern, pick the setting that produces the least noticeable horizontal white stripes.
      
      
      (A) Less noticeable horizontal white stripes
      (B) More noticeable horizontal white stripes
      

Note: To print and check the current setting, open the Start Print Head Alignment dialog box, and click Print Alignment Value.

Steve, your issue is not the bulb...

Sounds like you have a problem with either a ribbon cable from your main board to red LCD panel, or a main board failure.

I've refilled the toner cartridges a few times now and never had a problem with vertical streaks until recently. I refilled both the cyan and magenta and when I ran the test page I had dark vertical streaks on both sides. I fiddled around cleaning things, running cleaning paper through, changing reset resistors but to no avail so eventually decided to buy a replacement refurbished cyan cartridge since the streaks looked mainly blue and bingo... well almost now I just have very light magenta streaks. The issue is obvious when I compared the old and new cartridge, the replacement toner is a much duller cyan and is of the wrong consistency since once it's been in the printer everything gets covered in it which is why I think it causes the banding to occur. I'm just trying to work out now whether to try refilling the magenta again (v. messy) or just go for another refurbished cartridge (£34).

sounds like your deflection circuit is weak..seems a power supply issue is at hand..what documentation do you have in your possession?

never buy LG products again !

Probably the red convergence output IC has failed. The chip is basically a stereo amplifier that serves as a horizontal amplifier and a vertical amplifier. I suspect the vertical part has failed and is not uncommon. Should be generic STK392-150's or maybe STK392-110/120 I believe. By the way when the line moves up and down that means the vertical is working when it moves side to side the horizontal is working.