@fernandezjm that’s strange! The image on the OLED appears when pi-topOS is not communicating with the MCU inside the pi-top . This could be a couple of different issues:
- SD card is corrupt so the OS is not booting up properly
- Communication problem between the Raspberry Pi’s I2C pins and the pi-top 
For number 2, you can try popping the lid off the pi-top  by uinscrewing the two screws on the bottom (see step 1 here). Once the lid is removed, push down on the silver connector to make sure it has a good connection (see step 10 here).
Have you tried connecting a display to the pi-top or VNCing into it? If the SD card is fine but the problem is related to number 2 then it should still function normally, then at least we know where the problem lies.