I used my printer yesterday and when I turned it on today nothing happened. I was instructed to remove the power supply unit but it only comes loose on the left had side. When I plug the unit in the light on the back lights up.but I can't get the power unit out to check as instructed

SOURCE: HP c3180 inkjet printer problem

apply two or three drops of 3 in 1 oil to top of the big silver rod (inside printer cover)on which the ink cartridges ride.

UNPLUG RESTART AND Print

SOURCE: HP Office jet 6300 All-in-One

Hi

It was the power supply for the printer, I made a call to HP, and HP will replace it free.

Thank you for checking back with me.

Best Regards,

Christa

SOURCE: hp deskjet 1280 inkjet printer both light flashing

Did you try unplugging, wait 1 minute and replugging?

SOURCE: HP deskjet 5550 - Recommended troubleshooting not working

That's an oldie but a goodie. I bought a 5550 in 2002 and it still works!

1. Try disconnecting it from the computer and bring to a clear area with good lighting (kitchen table or garage work bench). See if you can see anything impeding the movement of the cartridges (you are correct...they should come to the center)

2. Power it up againd with nothing connected to it...see if the cartridges move.

I'll check my 5550 tonight when I go home, because I thought the cartridges came out from the Right Side...not the left. I wonder if they are jammed on the wrong side.

I know it's not much help, but I will check some more. Good Luck!

SOURCE: HP Deskjet 9800 will not power up.

Is there power coming out from the supply end
Is is a DC or and AC output supply?
If is it an AC output supply tyhebm in the back of the HP had an AC to DC converted that is realy a diode bridge and should contain a fuse in the circuit somewhere on that board