When printing spreadsheets, it doesn't print all the gridlines. I have changed my cartridges, uninstalled the printer and reinstalled it, and checked the printer cable to see if it was loose.
Nothing seems to fix it.
There are a lot of possible causes and solutions. First, make sure you have the latest driver for your printer. If that doesn't help, run the printer self-test to make sure all the jets are firing, looking for breaks in the pattern that would indicate a clogged jet. To clear up clogs, run the head-cleaning process for your printer. If your printer has problem jets that are in the ink cartridge, just replace the cartridge.