Lexmark MS812dn / MS812dtn
The printer posts a 126.01 Service LVPS (Low voltage power supply) error.
Make sure that printer is plugged directly into the wall outlet. Do not use a power strip, surge protectors or an uninterruptible power supply.
Make sure that printer has been turned on in an ambient temperature for about 30 minutes.
Update the printer’s firmware with the latest version.
LEGACY ID: TE556
111.21 service printhead error
Here are troubleshooting steps for a ‘121.xx’ Service Fuser Error (except for 121.02. 121.16, 121.41 and 126.01).