asked Sep 4, 2009 at 11:56am
Hp HP LaserJet 1200

No power on HP 1200

I have a hp 1200 printer that just lost power. It was working fine and then when I plugged the usb into my laptop the printer just lost all power. Is there a fuse that possibly is bad? Any help is greatly appreciated.
What about if you disconnect it from the laptop?
by moe on Sep 4, 2009 at 1:57pm Add comment
Even after disconnecting the laptop it's still dead. I tried leaving it unplugged for a day and then plugging it back in and still no power. - Anonymous
do not remember this unit having a fuse on the main board, but it is possible, but then again never heard of fixing a main board by replacing the fuse and it is always something else. The main board is located behind the back cover which is very easy to remove after removing the side covers.
by dmzcompute on Sep 6, 2009 at 10:06am Add comment
I'm guess I'm hoping it could be as simple as a fuse. I'll work on getting to the main board. If there is no fuse, is it worth trying to get it fixed, or just buy a new one. - opserc
The main board can be found on ebay:

I don't know if it is worth it to you to fix it or buy a new printer.
by rohmell on Sep 6, 2009 at 5:39pm Add comment
Thanks. It actually looks like there might be a fuse (in the upper right hand corner in the picture on the link). I'll check it when I get to the board. Is there anything else besides the main board that would cause a total power loss that you can think of? Any documentation you can direct me to for removig the panels?
by opserc on Sep 6, 2009 at 5:53pm Add comment
If it's a blown fuse, it would be the first time. I've seen lots of bad boards, but all the fuses were always good. Not to discourage you checking it, but don't want to build up your hope. That board comes off from the bottom of the printer. You do have to take the back cover off to access the connectors and there are a lot of those. They will only go back into their mating connector on the board, so don't worry about keeping track of them.
by moe on Sep 6, 2009 at 8:44pm Add comment
I removed the board and of course the fuse was good. Before I purchase a new board, is there anything else besides the main board that would cause a total power loss that you can think of? - opserc
I tried a new main board with no success. Is there anything else any one can think of?
by Anonymous on Sep 17, 2009 at 4:04pm Add comment
That board on the bottom supplies all the power that operates everything in the printer. Only other possibility is that the formatter board shorted out and is dragging down the main board. That board is mounted on the side of the printer.
by moe on Sep 17, 2009 at 5:00pm Add comment
Well, I feel a little embarrassed and it pains me to say that the problem was a bad AC cord. Not sure exactly how it went bad, but a new cord and power is back. The problem now is that nothing prints. I looked at all the plugs and believe everything is plugged correctly but nothing. The big control panel light and the top small light are green. The bottom control panel light is orange. Is there a “main” thing this might indicate?
by Anonymous on Sep 21, 2009 at 3:29pm Add comment
Since you did replace the main board, it has become impossible to diagnose remotely. I'm assuming the board came from eBay, so there is a high likelihood that it is bad, like a lot of stuff sold on eBay. Then, there are all the connectors on the board. Anyone of them could have been installed improperly. Good luck.
by moe on Sep 21, 2009 at 4:13pm Add comment
True, it was an ebay special. I guess I'll check all the plugs again and verify everything is plugged correctly. If it is still bad, I will probably try putting the old one back in. Thanks for all your assistance.
by opserc on Sep 21, 2009 at 4:42pm Add comment
There is a line for the service manual for an LJ1200 in the reference section. You could see if that has a list of error light patterns in it that would help in isolating your problem.
by unknown on Sep 22, 2009 at 7:48am Add comment
I thought there was a thread somewhere that discussed error lights but I can't find it at the moment.

If your lights are staying on solid, this thread suggests a next analysis step:


by unknown on Sep 22, 2009 at 8:04am Add comment
Just a final update. I rechecked all the plugs, made sure everything was shut correctly and like magic it's working again. Once again, thank you all for the help.
by Anonymous on Sep 29, 2009 at 5:41pm Add comment
Are you using the original board, or the replacement one that you bought?
by rohmell on Sep 30, 2009 at 4:40am Add comment
I'm using the replacement board.
by opserc on Sep 30, 2009 at 12:34pm Add comment
Well, at least you know that the seller of the replacement board was honest in selling you a working board.
If you are really the adventurous type, you could try putting in the original board and see if everything works with that one as well.
by rohmell on Sep 30, 2009 at 2:03pm Add comment
I have thought of it. If I have the time I might.
by Anonymous on Oct 1, 2009 at 8:07am Add comment
Seems like a lot of unnecessary work with a good chance of rendering the printer inoperable again.
by Anonymous on Oct 1, 2009 at 8:21am Add comment