Color LaserJet Pro MFP-M281fdw shows 49 Service Error after firmware update from 20th October

[incith]

Thanks Joop! I *live* for figuring out weird problems like this.  Without your random AliExpress file I don't think we ever would've gotten here!  Really appreciate you as well!

[R0ll0]

Thanks, nice work!

Cheers

[Deuils]

@Jordan

Umm, what could happen if one slipped with the jumper (paper clip) and shorted the R164 ground to another nearby pad during power up?
I started this procedure with my 281 and did just that. I've no idea which pad I hit but the display went blank and now I can't get the unit to power up.

Nervous and p***ed off with myself if I've done something terminally idiotic just because I couldn't hold my hand steady. 

[DASH19]

More than a month of frustration, this reset option has worked for me.

I have a Rev B board and was able to download the 20220414 firmware and get printer to work after 30 mins of repeated tries to jump the PINS.

thank you for everyone who contributed towards this resolution. This forum has been very useful and appreciate all the support provided here

[DASH19]

Katherine, JoopR, RepairTrooper....thank you, thank you, thank you... 

[Gökhan_]

@Deuils

Well here is a picture with circles marked.

The Pin header (J25) has its right pin going to ground and the left pin going to the bridge resistor (R168), the resistor (R164) will pass the ground to the LED.

If you ground the ground pin of (J25) to any pad in the green circle you should be fine. all of them are the same.

If you ground to any pad in the blue circle then I'm not sure where that via between the two pads goes, but as this will be ground when all components are populated (Older boards) should not be an issue, but don't quote me on that.

If you ground it to the pads in red circles, then you have a dead short as those pads are positive power rails, have not messured what voltage, but probably 3.3 or 5 volt. I added a red circle on the anode of the LED as that probably also positiv rail.

Any other pad around that area I have no idea what could happend.

If you grounded to the red circles you probably burnt a fuse. And as you are unable to power it on, I guess that might have happend. Hopefully it is only that and not more severe.

Where the fuse can be located.. well thats another question. I don't have the printer on hand any longer as it is in use now.
The boards power input is south of the firmware jumper, I can not see anything looking like a fuse from the pictures, if there is one on the other side.

Next point would be to check where the power cable (red ones) goes, the fuse will probably be on that board which would be the powersupply board.

[DanParker]

I have to confirm that I followed the instructions on itbacon and my printer has come back to life. No more error 49, no more looping! Thanks so much!

Everything you need is there, follow the instructions and it should work. my printer had the pins which were easily jumped with a small screwdriver, removed once printer was on.

Also, with the side panel, you only need to unscrew the back, open the front door and tray then it should clip off enough to get to the pins without removing the whole door.

Good luck everyone!

[ClearToSend]

I'm still waiting for my formatter board from AliExpress, so I have tried the techniques indicated on this forum for my bricked board (nothing to loose by trying to fix it).  Many thanks to everyone who has contributed.  So a quick summary of what has been done: New genuine HP cartridge installed, printer says "not a genuine HP toner".  Try updating firmware and as for so many others, the "Service Error 49" keeps the printer in a boot loop.  Short out the correct pads on the formatter board (a board without the reset pins or resistors in place) and use USBSEND to replace firmware.  As mentioned earlier in this forum there only seems to be one .RFU file that works (cljmfpM280fw_20220414.ENG.rfu) and this completes and gives me the "smiley" 🙂 When printer re-started, no more "Service Error 49" loop but during initialisation I get the yellow triangle with "Resend Upgrade".  I have read that sometimes the firmware needs to be sent multiple times so try several times to resent it via the jumpers and USBSEND and also via the .EXE file.  Still no luck.  I have tried the latest "official" version of the firmware (the one currently on the HP web site) M280_Series_FW_Update-20220414.nativeofficefonts but that doesn't work either.  I am reluctant to try a copy of 20221010 because if that does work, it won't recognise my genuine HP toners and so I still won't be able to print.  Unless anyone here has any suggestions, I am going to have to wait for my formatter board from China and hope that I can get that to work.  Sigh... such an unnecessary and expensive inconvenience.  I used to like HP printers...

[Deuils]

@GÖKHAN 

Thank you so much for that detailed info. I will have a scout around with the endoscope camera and see what I can find. Will also take the other side off the printer and see if there's anything there. 
It was so encouraging reading everyone else's reports of success. But what's happened to me is paralysingly typical of the sort of stupid bad luck that has been plaguing me for too long. 
It's a shame we can't give some award to Katherine, Joop, Gökhan, Repairtrooper, and everyone else who has done such exhaustive investigation. We clearly owe you a lot.

[bleep]

[incith]

I'm sorry the instructions didn't work for you 😞

I think you're the first to get the resend firmware.  It's weird that it wouldn't reload it.