Technical information

135
135
cartridge(s). It is common to have a marginally performing ink cartridge (which was performing ok
before) in the adjacent slot (i.e. color), then when a marginally performing cartridge is installed into the
other slot (i.e. black), both of the ink cartridge(s) then get flagged with electrical errors.
Please note this type of failure is quite rare with an ink cartridge that that has only been refilled once or
twice. Severe cartridge errors are primarily caused by an electrical breakdown at the cartridge’s nozzle
plate. Ink penetration or corrosion into the nozzle plate will cause a failure of the tiny micro -electronics
resulting in a variety of different error messages being displayed – see picture at bottom of this page:
http://inkjet411.com/?page_id=1216
Now, if your printer works routinely after inserting a brand new HP 92 and/or HP93 cartridge in it, you
should discuss the possibility of a refund with your local Costco (for the refilled cartridge purchase). We
regret your inconvenience, and we hope that you will continue to consider the compelling value of inkjet
refilling in the future.
Please let us know if the above test procedure was successful and able to provide any clarity on the HP
92/93 (?) cartridge issue. We apologize for the inconvenience.
For any additional questions please contact us directly: [e-mail]
-Thank you
HP PS 8049, 8050, 8100, 8150, 8400, 8450 (7800 & 7850?)- NOT RECOGNIZING CARTRIDGE (94-97)
Regarding your recent inquiry about the HP94 or HP95 cartridge error message ("???") and inability to
print to your HP PS 7850 printer, this type of problem could be an electrical connection issue between
the printer and one of the ink cartridges, or more likely, there is an internal micro-electronic failure
inside one of the ink cartridges. An electronic failure of the cartridge would be unrelated to the ink
cartridge refill process; these same failures can occur with brand new ink cartridges.* To determine
which cartridge is causing the issue and/or to confirm an electrical problem with one of the ink
cartridges (or possibly both which is 'very' rare), please perform both the Internal Self-Test page along
with the Pen Electrical tests (diagnostics) to evaluate the electrical condition of both ink cartridges....
Please first verify the age of the ink cartridge(s)....look at imprinted date on front (or back) of ink
cartridge. If this ‘warranty expiration date’ has expired, then potential cartridge failures can occur due to
internal corrosion, etc.
NOTE: Unfortunately, alignment pages and internal self test prints will usually print Ok even if the
cartridge is internally electrically damaged. Do not use these test pages as a proxy for determining
whether a cartridge is good or bad, only the ‘Tap 41/43’ diagnostic test report can yield this information.