50.3 Error code for a HP LJ M3035X

[PLopez05]

I replace the Maintenance kit, and restarted the Printer, it still shows that error code. Do I need to reset
or is there something else I need to be mind full of.

[cs_steve]

Go back and recheck all the fuser plugs ... make sure each one is fully plugged in.

If they are, try getting a warranty replacement on the new fuser you installed.

[redcow]

"I replace the Maintenance kit, and restarted the Printer, it still shows that error code."

You say the printer STILL shows 50.3. Does that mean that you had that error before changing the kit???
That's a 'fuser over temp' message.

[PLopez05]

Yes I did before I changed the Maintenance kit, I ordered the Engine control board, and the Low voltage power supply, the problem I am having now is getting a Service manual.