Recently, we've bought a set of 6 Raspberry Pi's, model 3B+. It were 6 complete packages: including an SD card with Raspbian, power supply and a case. 5 of them are doing fine and working like a charm. 1 of them however, is acting particularly strange; it is not booting. Originally we didn’t mind, because we ordered 1 extra, just to be sure. However, now we would really like to get that 1 running as well.
When I try to boot with only the power supply and a monitor via HDMI, I get the infamous green ACT LED blinking 4 times. I read the sticky boot-problems topic (https://www.raspberrypi.org/forums/view ... 28&t=58151), but unfortunately without a positive result. I have tried the following:
- Booting with a power supply of another Pi 3B+ that is working: not booting
- Booting another Pi 3B+ with the power supply: booting! So it’s not the power supply.
- Reformatting SD card using the Etcher program: not booting
- Booting another Pi 3B+ with the reformatted SD card: booting! So it’s not the SD Card
- also checked the HDMI connection, it worked properly on other Pi’s. So it’s not the HDMI cable or monitor.
- Booting from USB, still the same error pattern from the green LED
- Booting other pi with same USB. It starts booting, but does not finish: http://nl.tinypic.com/r/339udm9/9
The one thing I could image being the problem is that I accidently dropped the Pi once, but managed to break the fall with my shoe. I think it’s unlikely, but hey, maybe my clumsiness is the problem.
Do you bright minds have any clue? Is the hardware simply broken? Or did I overlooked something obvious?