939 service system board; what it's mean.

First, make sure the printer power is off and remove the RIP board. When you turn the printer back on, the only option on the display will be to perform the test. Pressing the button next to that begins the test. The page that comes out should have just a lot of lines printed on it. If this does not print or is somehow messed up, then the problem must be with the engine board. If this page prints and looks OK, then it is probably the RIP board that should be replaced. Please keep in mind that this test cannot be considered to be conclusive but it can be used to make an educated guess about which component is failing.

When the printer beeps five times and the operator panel is blank, there are several things that might cause this. It could be the op panel, the op panel cable, the Low Voltage Power Supply (LVPS), or the engine board. To find out which component is failing, the printer would need to be checked out by a service technician and the failing component replaced by him/her.