hi,

I have a machine equipped with a 840D system. On start up the seven segment display on the PCU 50.3 - C displays code 2C and both the LEDs(H1 & H2) are on and there is no display on screen. Can any body tell me what does this mean? and where can I find the details of these codes ?

i connected external pc monitor by DVI/VGA slot but also there is no display on screen

Take a look here, hope it helps

https://support.industry.siemens.com/tf//WW/en/posts/pcu-50-3-seven-segment-display/77341?page=0&pageSize=10

thanks

i saw this topic before

but code in my problem is 2c

we solve the problem now, and modual is running again

the mother board was defective and we repait it