I called Ricoh getting light blue lines down the left side of my color pictures. They told me I need a new photo color conductor unit. I have only used my Ricoh for 11 months and not continually. It is about 18 months old. I am a watercolorist and will print out color demos of my paintings and I am getting this light blue line throughout the color on the left side, no more than 1/16 inch wide. My printer has never given me a message saying that it needs replaced. I have gotten messages for color toners but not the color conductor unit. I ordered a new unit but I haven't installed yet. Is this what the problem really is if I'm not getting a message???? Thank you in advance for any advice
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Get the latest driver from Canon's web site. Then uninstall the printer. Remove the driver from your computer. Use regedit to remove any traces of your printer from your registry. Install the new driver. That should do it.
The failure(s) in your TV is related to a part called light engine or optical block and Sony TVs are known for these kind of failures with the video showing with different colors or lines.
Check the link provide for more info or if you would like to try fixing the TV yourself.
Let me know if you would need further assistance.
Where best to look will depend a little on the nature of the smudge.
If what you're looking at is white, then you might just have a little heap of toner or paper dust on part of the LED array that paints the picture onto the photoconductor drum (look for a narrow unit that stretches full width, adjacent to the drum.
Dark marks may, if you're lucky, be down to dirt on charger wires.
Both respond well to cleaning with a vacuum and a soft cloth (be very gentle if cleaning the wires).
I would be inclined to trust the existing photoconductor unit unless you know it's been abused (e.g. by leaving it lying around in daylight) or the coating on the drum is visibly damaged.