My son has bought a RPie 4 and has had an issue, so bought another unfortunately with same issue, any help please.
The RED led is permanently lit, GREEN led blinks once..... without SD card in, it flashes 4 times as expected, I can't find a description of what 1 flash on the Green act Led means ?
He has put Raspbian on 3 different cards 16gb, 32gb, 64gb all work OK in my Pie 2. My working 8gb card used in Pie 2 is the same in his Pie 4.
Obviously no display on HDMI.
He has reflashed bootloader.
He has had the same symptoms on 2 different RPise 4's from different suppliers on Amazon, any help, thoughts or suggestion please.