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i know this is probably to late to help you but if you have a power serge most likely it took the mother board out,the new boards come with a serge protector most common board ir wr55x10942,everthing on this machine runs through the board.hope this helps
Connect the printer power cord to the Wall Outlet or Wall Jack. Make sure it is not connected to the Serge Protector or power strip.
Partial reset :-
Now on the printer itself. --> Press and hold the # and 3 button at the same time. Now take out the Power cable from the back of the printer and wait for 20 sec. Now put the power cable back in the printer. Now release the two buttons. ( Note :- remember you need to hold down the # and 3 button the hold time )
(On the printer screen it should say Part nvm reset.)
Now try to turn on the printer and check. If it works Perfect. If not then do this :-
Open the front door and take out all the cartridges from the printer. Now close the door.
Now on the printer itself. --> Press and hold the # and 6 button at the same time. Now take out the Power cable from the back of the printer and wait for 20 sec. Now put the power cable back in the printer. Now release the two buttons. ( Note :- remember you need to hold down the # and 6 button the hold time )
( On the printer screen it should say Semi-Full rest )
The printer might shut down automatically or may be it won't. At this point Put the cartridges back into the printer and then turn on the printer if it was shut down. or If the printer is on turn it off and then switch it back on.
The problem should be resolved up till now.
If still the problem Exist Call HP as the product has gone bad.
HP :- 1-800-474-6836 ( Tech Support )
ok First question does the led continue to blink after 70 seconds after u plug it in. it is common for a cuircit board called the dm(digital module) to go bad in these units. this set has a keyboard lockout feature. Press menu for 10 seconds on front panel. if that does not release control then u more than likely have a problem with dm module. there are several bullitens about this and several things a tech can do to repair this set