Buy a serviced and tested YSUS board 1032302-HS and send your old dud to receive credit
If your HP PL4260N has developed a very dark, grainy image chances are very good it is because of a failed X sustain board.
If your HP PL5060N is totally dead or if it tries to come on and shuts right back off it may need a power supply board replacement. See listing for more details!
These are the essential components needed to repair HP sustain board 1032298-HS.