My 2GB Pi4 arrived from the UK. My good friend sent me a micro-HDMI to HDMI adaptor along with the Pi and a 3d-printed case he made – except he didn’t…. the adaptor is a micro-USB to HDMI adaptor – NOT what the RPI4 uses.
Because I’m impatient I’d already upgraded my RPI3 setup from Raspbian Stretch to Buster so I had both SD and USB3 backups lying around….
I tried USB3 to a QuickCharge 3 PSU and also the normal USB output from the charger – I tried both SD and USB sticks – nothing. Nice red light on power up and maybe a hint of green at first… but SSH would not connect. I checked to see if the fixed IP had moved – no sign of the board in advanced IP Scanner on my PC.
Finally I put the USB stick back into my original Pi3 to make sure it was not corrupted – worked just fine there.
I’ve tried putting a blank ssh file in the root of the FAT32 section of a brand new BUSTER SD made with AlenaEtcher – no further forward. A mouse triggered some minor green light flashing but still nothing showing on my PC in Advanced IP Scanner.
Eventually I went out and bought a mico-HDMI to HDMI lead and LO, everything started to work, except USB boot, which, inexplicably doesn’t work yet (see RPI forums). It will, they just don’t have it working yet. You can boot from SD just like a Pi2 and run everything else from USB…. but really guys…. right now apart from the improved speed of USB3, this is a backward step from Pi3 which DOES run and boot from USB. That /boot/config.txt OTA mod that enables USB booting on the Pi3 no longer works on the Pi4.
So right now I can run my Buster Pi3 upgrade on Pi4 SD – or a new Buster installation on the Pi4 – updating “the script” to work with Buster took the better part of a day and my friend Antonio did the bulk of that work.
On Pi4e using a copy of my Buster setup on Pi3, my CLS command works but initially reported false RAM i.e. 1G/1G which was wrong – now fixed. It correctly (I believe) reports the speed as 15000Mhz and temperature as 60c in my case (as it is warm here and no fan yet).