Won't boot on RPI3Bp

Hi
My Raspberry Pi3b+ wont boot! Black screen all the time, but keyboard led let me think is working…
Tried 2 times without success.
With Ubuntu Mate works fine, so, the RPI and the SD card is OK.
What to do?
DietPI I downloaded is only 140MB . Is this OK?
Regards,

Paco

yes DietPi is a lean and small version of Raspian light and it’s compressed into within a zip file to reduce download size. However if your unpack the *img file, it should be bigger. Can you check status on your LED during startup as described on this article

https://www.raspberrypi.org/forums/viewtopic.php?t=58151

Thanks!

I think there is a video problem, DietPi can’t display a resolution the screen accept.

With other distros don’t fail

Paco

did you tried a different Screen? Are you able to login using SSH?