pi 3 b+

[stingray124]

i tried to install 7.2 on pi b+    after i flash it on sd card . i install sd card in my pi, connect the hdmi 
and start up the pi i dont see anything on screen.

i tried 192.168.8.1 in my browser and blank with cat cable connected to my pc.

[MikeKrebs]

Look for it in your router and make sure you can see it.

[JonD]

Just confirming that you are using software like etcher to create the SD image.  You can't just copy the file over to the SD card.  The card needs a bootable image which requires a program like rufus, etcher and a few others.  If you have done that you might have a bad SD Card.  You might try another SD card, or maybe using the SD Association card formatter tool and format the SD card before applying the image..