HP Printer Error Code 74: How to Fix It
Medium 30-90 minutes Medium Severity
Verified June 2026
- Error Code
- 74
- Brand
- HP
- Product Type
- printer
- Severity
- Medium
- DIY Difficulty
- Medium
- Estimated Fix Time
- 30-90 minutes
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Tools You'll Need
- Phillips screwdriver
- Flat-head screwdriver
- Lint-free cloths
- Multimeter (optional, for voltage testing)
- Anti-static wrist strap (recommended for internal work)
- Compressed air can (for cleaning dust)
How to Fix Error Code 74
-
Power Cycle the Printer
Always unplug the printer from the wall before performing any internal inspection. Never simply press the power button — full power disconnection is required to safely discharge internal capacitors. -
Inspect and Reseat the Toner Cartridge
Avoid touching the green drum surface on the toner cartridge, as skin oils can permanently damage the drum. Do not expose the cartridge to direct sunlight for more than a few minutes. -
Check and Reseat the Imaging Drum Unit
Unplug the printer before removing the drum unit. The drum is sensitive to light — do not leave it exposed for more than a few minutes. -
Inspect Internal Cable Connections
Only proceed with this step if you are comfortable with basic electronics handling. Static discharge can damage circuit boards — touch a grounded metal surface before handling internal components. Do not force any connectors. -
Test with a New Toner Cartridge
Only use cartridges rated for your specific HP printer model. Using an incompatible cartridge can cause further damage. -
Replace the High Voltage Power Supply Board
This step involves disassembling the printer and handling circuit boards. Unplug the printer and wait several minutes before opening to allow capacitors to discharge. If you are not experienced with electronics repair, consider having a professional technician perform this step.
Parts You May Need
High Voltage Power Supply Board (HVPS)
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Toner Cartridge
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Imaging Drum Unit
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Internal Ribbon Cable / Wire Harness
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High Voltage Power Supply Board (HVPS)
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Toner Cartridge
Check Price on Amazon
Imaging Drum Unit
Check Price on Amazon
Internal Ribbon Cable / Wire Harness
Check Price on Amazon
High Voltage Power Supply Board (HVPS)
Check Price on Amazon
Toner Cartridge
Check Price on Amazon
Imaging Drum Unit
Check Price on Amazon
Internal Ribbon Cable / Wire Harness
Check Price on Amazon
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When to Call a Professional
If you have completed all steps — including reseating the cartridge, drum unit, and cables — and the error code 74 still appears after a power cycle, the high voltage power supply board has almost certainly failed. If you are not comfortable disassembling the printer or handling internal circuit boards, contact an HP-authorized service technician or a local printer repair shop. Additionally, if your printer is still under HP warranty, do not attempt internal repairs yourself as it may void coverage — contact HP Support directly at support.hp.com instead. For high-volume business printers, professional repair is recommended to minimize downtime.Frequently Asked Questions
What does error code 74 mean on an HP printer?
Error code 74 on an HP printer indicates a fault in the high voltage power supply (HVPS). The HVPS delivers precise electrical charges needed for the toner transfer process. When it malfunctions or detects an abnormal voltage condition, the printer stops and displays error 74 to prevent internal damage.
Can a bad toner cartridge cause HP error code 74?
Yes. A defective, counterfeit, or incompatible toner cartridge can disrupt the high voltage circuit inside the printer and trigger error code 74. Try replacing the toner cartridge with a genuine HP cartridge compatible with your printer model to rule this out before replacing any internal components.
Is HP error code 74 covered under warranty?
If your HP printer is within its warranty period, error code 74 due to a faulty high voltage power supply may be covered. Contact HP Support at support.hp.com with your printer's serial number to check your warranty status. Do not attempt internal repairs yourself if the printer is under warranty, as doing so can void coverage.
How much does it cost to fix HP printer error code 74?
If a new toner cartridge resolves the issue, the cost is simply the price of the cartridge. If the high voltage power supply board needs replacement, the board itself typically ranges from $20 to $80 depending on the printer model, plus labor if a technician performs the repair. For older or lower-cost printers, it may be more economical to replace the printer entirely.
Will turning off and unplugging the HP printer fix error code 74?
A full power cycle — turning off the printer and unplugging it from the wall for 60 seconds — can clear a temporary electrical glitch causing error code 74. However, if the error returns after the power cycle, there is an underlying hardware issue such as a faulty toner cartridge, a loose internal cable, or a failed high voltage power supply board that needs to be addressed.