Ninety percent of the Printer problems are rectified by a non-technical person. Because most of the time the problem is not because of the electronics inside the Printer. Instead most of the fault reported about the printer is due to some mechanical fault in the printer cable. It could also be due to printer not being setup properly. It could be due to some problem in the Software. (troubleshooting)
Troubleshooting Dot-Matrix Printer
Print Quality Poor
-Ribbon Worn Out or Damaged
-Print Head Too Close to the Platen
-Ribbon drive Assembly Faulty
-Print head is faulty
No Power to Printer
–Fuse has Blown
-Faulty Power On-Off Switch
-Internal Power Supply has failed
-Main Logic Board is Shutting Down the Power Supply
Power OK but No Printing
–Printer Cable Not Installed Properly
–Printer Cable is Faulty
–No Paper or Paper Installed Properly
–Printer Port Connection at PC is Faulty
–Self Test is OK and PC Printer Port is OK
Grinding Noises
–Obstruction Along Paper Path
–Ribbon Drive Assembly Faulty
–Ribbon Carriage Assembly Dirty
–Gear Train Assembly Worn Out or Damaged
Paper Jamming/Misfeeding
–Paper Quality Poor
–Obstruction Along Paper Path
–Sensors Faulty
–Tractors Worn Out
–Main Logic Board is Faulty
Troubleshooting InkJet Printers
Print Quality Poor
-Ink Cartridge Empty or Faulty
–Print Head Faulty
–Purge Unit Assembly Faulty
–Printer Requires Service
–Printer Operation Out of Sync
No Power to Printer
-Fuse has Blown
-Faulty Power On-Off Switch
-Internal Power Supply has Failed
–AC Power Supply has Failed
–Main Logic Board is Shutting Down the Power Supply
Power OK but No Printing
–Printer Cable not Installed Properly
–Printer Cable is Faulty
–No Paper or Paper Not Installed Properly
–Printer Port Connection at PC is Faulty
-Self Test is OK and PC Printer Port is OK
Grinding Noise
–Obstruction Along Paper Path
–Purge Unit Assembly Faulty
–Gear Train Assembly Worn Out or Damaged
–Printer Operation out of Sync
Paper Jamming/Misfeeding
–Paper Quality Poor
–Obstruction Along Paper Path
-Sensor Faulty
–Main Logic Board is Faulty
Troubleshooting Laser Printers
Print Quality Poor
–Toner Cartridge Faulty
–Drum unit Faulty
–Transfer Corona Assembly Faulty
-Fuser Unit Assembly Faulty
–High Voltage Power Supply Faulty
–Laser Scanner Unit Assembly & Optical Fiber Cable
No Power to Printer
-Fuse Has Blown
-Faulty Power On-Off Switch
–AC Power has Supply hs Failed
–PCA Interface/Main Logic board is Shutting Down the Power Supply
–DC Controller os Shutting Down the Power Supply
–DC Power Supply is Faulty
Power OK But No Printing
–Printer Cable is Not Installed Properly
–Printer Cable is Faulty
–No Paper or Paper not Installed Properly
–Printer Port Connection at PC is Faulty
-Self Test is OK and PC Printer Port is OK
Grinding Noises
–Obstruction Along Paper Path
–Gear Train Assembly Worn Out or Damaged
-Toner Cartridge is Faulty Main Motor Faulty
-Fuser Unit Assembly Faulty
–Cooling Fans
Paper Jamming / Misfeeding
–Paper Quality Poor
–Obstruction Along Paper Path
-Toner cartridge is Faulty
-Fuser Unit Assembly Faulty
-Sensor Faulty
–Paper Output Delivery Assembly Faulty
–Paper Registration Assembly Faulty
–Clutch Drive Assembly Faulty
–Paper Delivery Assembly Faulty
Fuser Malfunction
-Fuser Unit Assembly Faulty
–AC Power Supply Faulty
–DC Controller Faulty
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