Hello I'm a rookie tinkerer hopping to find some knowledge about these big color laser printers and copiers.

The specific model I would like to fix.
KONICA MINOLTA C250P this is the printer only version of the full office photo copier. I have a one of the full office copier version for part too (that one gives an error for the yellow laser).

https://photos.app.goo.gl/cwVu2KYB6Yva5Ais6

I'm adding a link above to a picture of print out form the C250P with visible vertical lines of CYAN YELLOW and MAGENTA mostly on the right side of the 11x17 print....

Hi Guys,
I thought I write you a tutorial on how to remove your bios password from your lenovo x390 yoga.
Steps:
1. Get an EC programmer and read the EC firmware.
2. Back up your working EC file !!! (on this modell EC stores all hardware infos and you cannot replace it with others)
3. In your EC firmware file find all of these ranges with a hex editor and replace them with 00:
!!!!!! IMPORTANT THAT YOU ONLY MODIFIED THE SPECIFIED RANGES AND NO MORE.
(I have used HxD Hex editor FREE for this since I found that it is easy to replace ranges)
0x36000...

Hi all, first I'd like to say thank you for taking the time out of your day to help me. So I have this HP Officejet Pro 8620 Printer that doesn't want to print at all. Once I turned the printer on I'm given this message “the print head appears to be missing, not detected, or incorrectly installed. Error Code: 0xc19a0013.” I was wondering if it's still worth repairing and if so what can I do to fix it? I've attached pictures of the message and the printer itself. Thank you again!...

Hej.

I'd like to share with you a script I wrote for editing the Serial Number and Windows Key in some Lenovo BIOSes. It works with Ideapad, Legion etc. I don't test every model.
Please excuse the style and minor errors, but I'm not a programmer.
The script was written in the environment provided by Hextor (I switched to it from HxD and it works great).
https://github.com/digitalw0lf/hextor

Usage:
Open the BIOS file with Hextor,
Paste the script on the right side of the screen into the Script tab (you can also save the script for later),...

2 years after I fixed 2 ES7411 printers (see post here), one of these stopped printing "correctly" . From one day to other, when sending something to print it was printing out the following:



What it seemed a software Postscript error it has turned into a mainboard PCB issue (thanks GOD I have 2 printers to swap and test).

I took the PCB, removed the 10 caps and 5 of them were faulty. So with a simple recap, I have the printer again back to live. Here the 5 that were faulty.........just in case it might help someone in the future.

...