Hi, I have searched this forum and this appears to be faulty hardware. However, more than 1 example? Read on and please advise.
I have just started assembling our machines with a new batch of Model 3B+. 4 of the batch exhibit the same problem so it is unlikely they all got through QC at the factory with a problem. And yet...
Observations:
1/ We copy our production SD Card with a working 3B+.
2/ That SD Card is then verified with a second working 3B+.
3/ That SD Card is then inserted into the new 3B+ to be tested with our machine (a medical device).
4/ Normally it boots and we can run our QC.
5/ We purchased a batch of 20 last September when supplies appeared problematic, but have just got to them.
6/ Supplier is a major supplier of Raspberry Pi stuff, so no reason to believe not genuine.
Observations:
The SD Card above does not boot. I have tried 4 of this new batch of 20 so far. Put the SD Card back in the working 3B+ & boot OK.
Tried several SD Cards that work fine on other 3B+.
Tried both Raspberry Pi 7" DSI and our alternate HDMI screens.
The Red LED lights up with power, there is no colour display on the screen.
The green ACT LED flashes 4 times, then 7 rapid flashes. Pause. Then Green LED repeats pattern.
The Ethernet activity light does not come on.
Remove power and the RED LED stays on but very dim. Remove HDMI plug and RED LED goes out.
Plug HDMI back in, RED LED is Off until power is applied again. The cycle above repeats.
Previous forum STICKY suggests this would be a hardware problem, possibly a bad SD Card contact.
But 4 new items with the same fault? Pretty unlikely.
Have I overlooked something here?
Regards to all...
I have just started assembling our machines with a new batch of Model 3B+. 4 of the batch exhibit the same problem so it is unlikely they all got through QC at the factory with a problem. And yet...
Observations:
1/ We copy our production SD Card with a working 3B+.
2/ That SD Card is then verified with a second working 3B+.
3/ That SD Card is then inserted into the new 3B+ to be tested with our machine (a medical device).
4/ Normally it boots and we can run our QC.
5/ We purchased a batch of 20 last September when supplies appeared problematic, but have just got to them.
6/ Supplier is a major supplier of Raspberry Pi stuff, so no reason to believe not genuine.
Observations:
The SD Card above does not boot. I have tried 4 of this new batch of 20 so far. Put the SD Card back in the working 3B+ & boot OK.
Tried several SD Cards that work fine on other 3B+.
Tried both Raspberry Pi 7" DSI and our alternate HDMI screens.
The Red LED lights up with power, there is no colour display on the screen.
The green ACT LED flashes 4 times, then 7 rapid flashes. Pause. Then Green LED repeats pattern.
The Ethernet activity light does not come on.
Remove power and the RED LED stays on but very dim. Remove HDMI plug and RED LED goes out.
Plug HDMI back in, RED LED is Off until power is applied again. The cycle above repeats.
Previous forum STICKY suggests this would be a hardware problem, possibly a bad SD Card contact.
But 4 new items with the same fault? Pretty unlikely.
Have I overlooked something here?
Regards to all...
Statistics: Posted by alk33 — Wed Mar 27, 2024 3:30 am