20
HP Printer
Severity: ModerateWhat Does This Error Mean?
Error 20 means your HP printer does not have enough memory to process the print job. The document you are trying to print is too large or complex for the printer's available memory. Simplifying the document or reducing print quality often resolves this error.
Affected Models
- HP LaserJet 4
- HP LaserJet 4 Plus
- HP LaserJet 5
- HP LaserJet 8000
- HP LaserJet 4050
Common Causes
- The print job contains high-resolution images or graphics that exceed the printer's memory
- You are printing a large multi-page document all at once, overwhelming available memory
- The printer's memory is very low — older LaserJet models shipped with minimal RAM
- A complex font or custom font download is taking up too much memory
- Another job is already in the printer's queue consuming available memory
How to Fix It
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Press the Continue or Go button on the printer. This tells the printer to process the job in smaller pieces.
The printer may print the job correctly but more slowly. This is normal behavior when memory is limited.
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If the error repeats, cancel the current print job. On your computer, open the print queue and delete all pending jobs.
Clearing the queue frees up all printer memory so you start fresh.
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Open the document and reduce the print resolution. Change from 1200 dpi to 600 dpi in your print settings.
Lower resolution dramatically reduces the memory needed to process the job. Most printed documents look the same at 600 dpi.
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If the document has many images, try printing it in sections — a few pages at a time — rather than the entire document at once.
This reduces the memory needed for each print job and usually eliminates the error.
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In your print driver settings, enable 'Print as Image' or 'Raster' mode if available. This converts the document to a bitmap before sending it.
Raster printing uses less printer memory because the computer does the rendering work instead of the printer.
When to Call a Professional
Error 20 is usually resolved by adjusting print settings or simplifying the document. If you regularly print complex graphics and the error is frequent, upgrading the printer's RAM is the best permanent fix. A technician can install a RAM upgrade for $30 to $80 depending on the model. Contact HP Support at 1-800-474-6836 for compatible memory module options.
Frequently Asked Questions
Can I add more memory to my HP LaserJet to fix error 20?
Yes. Most HP LaserJet printers have a memory expansion slot. Adding a compatible DIMM memory module is a permanent fix for error 20. Check your printer's specification sheet or HP's website for compatible memory upgrades.
Why does a simple document trigger error 20?
Even a simple document can cause error 20 if it uses downloaded fonts or embedded images. Each font the printer downloads uses memory. Try switching to a standard built-in font like Courier or Arial to reduce memory usage.
Does turning off the printer clear error 20?
Yes. Turning the printer off and back on clears all memory, including any stuck print jobs. However, the error will return if you send the same complex document without adjusting settings. Fix the root cause — reduce resolution or simplify the document — before reprinting.