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HP Recommended
500 color M551

Since replacing the black printer cartridge in our laser printer on 8/22/17, we're noticing faint black vertical streaks down the paper, about 2 inches thick.  This issue seems to occur intermittently (not with every print job) but very frequently.  

I've gone through the steps suggested on the support site:

1. Print Cleaning Page

2. Print Quality Troubleshooting procedure

3. Removed the black cartridge and gently shaken it

 

However, the issue still persists.  The last suggestion is to replace the cartridge.  But this is a max capacity new cartridge that 80% full and cost close to $200.  I don't think replacing is the most economical solution.  

 

What other steps may I take to resovle this?

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