> * I knew someone who did 217 calculations as his job. One of the things > he did was help design color TV picture tubes so that they would fail a > couple of months after the 1 year warranty ran out. Situations are even worse. I have good reasons to suspect that my printer has an algo to intentionally killing itself and the print head. I shall be able to do more test when my stock of refill ink run down. For the time being, I shall resist to swap "old" print head to another "old" printer. It is quite a tough money to make in the consumer electronics areana when compare to the fashion industry when a pair of jean easily price higher than a MP3 player. But... Ling SM -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist