OKI ES7411 or C712 is not powering up

[Germanbizhub]

Dear friends,

i've got an OKI ES7411 which is not powering on - when i turn on i makes a short clicking sound and nothing happend. Luckily i got an C712 (is working), which is mostly the same with ES7411 to replace the Power supply. This was mostly my thought that the failure will disappear - but it didn't. Changed the switch as well... I have no deeply experience with this model - i'm only an konica /kyocera / brother typ of technician. Has someone knowledge about it? I would think Mainboard - but most brands even showed up with an error code, when main is defective.

Thank you in advance.

[hellcat]

You need to replace the AC Power board, Its common for these to go out on this model, we have replaced quite a few before most of our okis were upgraded in the field.

[Germanbizhub]

Hi hellcat, thank you for your response. In the end i tried different things and i took the AC Power Board from an old /defective OKI C712 to ES7411, but i made a mistake and it began to smoke . Regards to the 11 year old machine and the fleetmanager which said, that all toners are going near empty, i decided with the customer to use a bizhub C3301i now.

Thanks for your reply.