The screen didn't show anything

I tried following everything.I thought I did a good job but on step 12 my screen didn’t show anything. PLEASE HELP!

Please add some pictures of top and bottom of your card… Side picture could help a little (but this one is blur) but alot less than top and below solders can be seen.

Hi, I also recommend you try Step 13 and solder the R3 10k resistor and retest…