1st, the Dell AIO 942. It appears you have "clogged inkjets" on the printhead itself. Usually, a good cleaning resolves this. But, if repeated clean cycles don't work, then the electronics or wire harness is bad. I hardly find that the case though, as the prthd. usually is the issue. The ? is, can you afford repeated clean cycles as it dumps ink through. Using the "test pattern" initiate a self-test printout the ptr. offers from whatever buttons depressed to start that, check results.