According to the MP800 Service Manual: 2-2. It's probably not worth fixing, with printer prices being fairly low. This is an error indicating a problem with the Logic Board Assembly.

This process will clear the error codes that you keep receiving. Remove data cable and reinstall the software for this printer, press and hold the power button on the printer for 15 seconds, then reconnect the printer after software installation is successful. Shut down the printer and pc associated with it. If you getting error codes then follow this We need to clear out these error codes stored in your printer NVRAM or memory! Try to remove each panel that opens and check for broken pieces of paper Recycle the system by reinstalling the software once again. And both leave in the same state, i am tempted to say its not the PSU. Hi, I have a cash beast machine, whenthe unit is powerd up, nothing happens, the mpu5 had got the -12v and the 34v leds on but nothign else, i have looked over the board to check the various status leds and as far as i cansee all of them are on, could this be a power supply problem, or is the card dead, does anyone know what/where i could look to see if i can find the fault, i do have 2 power supplies. Next we were asked to select the image we wanted to use Barcrest Mpu5 Technical Service Manual the background. Mpu6 -Generic Horizon-manual-short-Form Issue 1.3- No Safety - Download as PDF File (.pdf), Text File.

Barcrest mpu5 manual pdf