Troubleshooting • Re: Pi4 solid red and green led

Just started experiencing this issue this week. Have had three go down starting 8/11/2024 around 8:00 AM EDT. All of the posts about boot loading, SD card format, EEPROM reload, swapping HDMI cables, removing all devices connected, etc... I don't believe are having the *same* solid red and green light I / (some of us) are reporting.
On two of the Pi's, with nothing connected but power (I even disconnected the fan) there is a distinct audible "squeal" or "hiss" coming from the board when power is applied. I'm far from an expert when it comes to these types of things but I know enough to know that that is NOT normal. As far as I know, there's no speaker of any sort on the board itself. Not even a piezo. So one of the chips is making an "angry" noise when power is applied.
The boards and power supplies are all "stock". I am providing a link to the kits I am using, for reference, so you can see what I mean when I use the term "stock". This is in NO WAY an attempt to attack or speak ill of the vendor. Other than these 3 (which were all bought and install at the same time last year) I have had great success with products from this vendor.
https://www.amazon.com/GeeekPi-Raspberr ... a_hp_atf_d

Whatever is going on, it is not only affecting the Pi board itself, but also the power supply.

1. Connect a new power supply to one of the suspect bad boards (no microSD), get red/greed solid.
2. Connect a new power supply to one of the suspect bad boards (NEW microSD with factory bootloader fix from Pi Imager), get red/greed solid.
3. Connect the suspect power supply to a "fresh" board (no microSD), get solid red with very tiny, rapid flashing green.
4. Connect the suspect power supply to a "fresh" board (NEW microSD with factory bootloader fix from Pi Imager), get solid red with very tiny, rapid flashing green.
5. Connect a new power supply to one of the suspect bad boards (with microSD from a "bad/damaged" board) and HDMI to monitor, get red/greed solid nothing on monitor.
6. Connect the suspect power supply to a "fresh" board (with microSD from a "bad/damaged" board) and HDMI to monitor, get red/greed solid nothing on monitor.
7. Connect a new power supply to new board (with microSD from a "bad/damaged" board) and HDMI to monitor, get red/flashing greed and I'm back in business!!! YAY???
   
   So in my case, something is "cooking" my board and supply.
   
   The Pi's are all in an air conditioned, office environment. They are all on surge suppressors as well as the TV they are connected to.
   
   They are just posting stats of project progress on TV's.
   
   So I'm at a loss. Unfortunately they are right at a year and a few months so I didn't bother contacting the vendor. I just got a couple replacement boards for now but I would love to find a solution instead of buying new boards every year.
   
   In contrast, I've had 6 Pi 3B+ models out in our manufacturing plant running non-stop since Q4 of 2017. The plant can get as hot as about 115 F in the summer and about 38 F in the winter. This is a manufacturing plant so there's minute dust particles, fiber glass, carbon black, humidity, heat, cold, power shut downs... you name it!
   
   But.... the six or seven Pi 3B+ I have out there are still running strong.
   
   I'd love to know if there is ever a fix for this, again in my scenario, obvious hardware issue (bad batch or lot). Until then, I guess I'll keep a few 4B boards and power supplies on hand just in case.

Statistics: Posted by TechPiJester — Thu Aug 15, 2024 3:18 pm

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