This printer is very hard to repair and when sent to epson for service they just send back a new printer 99% of the time (in this case 1430). 1400s are no longer really serviced although they are essentially the same printer as the 1430.
Did you buy our flush kit? Off amazon?
The best way to use this flush kit (if you bought it from us) is to let the PiezoFlush sit for 48hrs. Also make sure to use fresh carts and fresh ink afterwards.
Also make sure you have a working cleaning assembly and clean the flush box. You may need to also put a waste ink bottle in the back because you may have crud that has dried in the waste ink pad (bottom) of the printer that is not allowing ink to be vacuumed from the head.
I suggest buying our newest design of refillable cartridge (available individually even on our website). The ink outlets on these new carts are a significant upgrade.
If all fails, you may simply have fried electronics in the print-head, control board, or printer cable itself.