I need help for pi boot again.
After I make one Raspberry pi 3 B+ working, I purchased 3 sets of PIs from PI Shop.
Today I insert the pre-load Raspbian micro SD card into Raspberry pi 3 B+, it booted up. And I enter all the info it asked, everything moved smoothly. At the end, it says <restart> PI. after restart, I got a black screen and shows <no signal>. the green LED doesn't blink. I switch the micro SDs between this one and my first working pi, this pi still doesn't work while the first working pi works. Is this new pi damaged ( the 5V is still there)? And now I am afraid to try the other 2 PIs.
Any help will be greatly appreciated.