What should I check for if my Epson printer is in an error state due to a potential hardware issue like a paper jam or ink cartridge problem?

For paper jams, carefully open all access covers (front, back, duplex unit) and gently pull out any jammed paper, following the direction of the paper path. Avoid tearing the paper, as small pieces can remain and cause further issues. For ink cartridge problems, ensure all cartridges are correctly seated and not empty. Try removing and reinserting them firmly. If the error persists, one or more cartridges might be faulty or incompatible, requiring replacement with genuine Epson cartridges.