Forgive me for the length of this post but I find it fascinating to observe how, on various forums for very different products, what can happen when people come upon a really nasty situation. Sometimes it's something genuinely difficult, and hopefully it's covered by troubleshooting guides or someone has hit it before or seen a solution elsewhere, and that's the end of it. Brilliant.
However, sometimes the process doesn't go too well. For example when people respond to the OP asking what appear to be sensible, basic questions which would help to refine where the solution may lie. The OP can then seem to go to any lengths to avoid answering the people who are trying to help. Obviously when there are multiple native languages involved that may make things more difficult, but in many cases that's not the problem.
Then you get the posts where someone has a project with a specific aim, and they start down a particular path and things don't go well. Sometimes the answer is to go back to when things were going ok, then step sideways to a different path. Occasionally the aim is unachievable with the technology employed. Sometimes you need to go back to the beginning. Sometimes you need to stop digging and look carefully at the hole (or sometimes the whole) In this case it unfortunate to not have bought a Pi5 psu.
In this case, the OP may of course have purchased a broken Pi 5, after all its bound to happen occasionally. Alternatively they may have damaged it mechanically or by ESD when puttng it in the case, for example. In either of those situations only swapping the pi will fix it, and may mean buying a new one. But lets assume that's not where we are.
I notice he mentions the case has a pwm fan, but he doesn't say which case it is. If it were an Argon one V3 for example, did the daughter board that moves the usb-c power socket to the back connect properly to the pi 5 (I have seen comments about that can be tricky)? Is the power budget of the pi4 psu enough to supply the pi5, whatever the case has in it and its fan.
If it were me in this situation, I would have bought the new Pi5 with a new Pi5 psu (as its a relatively small extra cost), as I could then easily continue to use the Pi 4 for something else. He hasn't mentioned why he was seemingly willing to set aside Pi4. Could it be it became unreliable? Could that have been a faulty PSU? Not seen any complaints about RPi psu reliability, and I haven't personally had any problems, but its possible. With only one psu, hard to tell. Is the mains supply the psu is plugged into reliable?
Unfortunately not even removing the case is easy as there probably aren't spare thermal pads to reassemble it properly. In many ways it would be good to just have the Pi5, a usb mouse and usb keyboard and monitor with the Pi4 Psu to run with for long enough to establish whether that works ok. As we don't seem to be able to get there then, if it's nothing mentioned above, as far as I can tell it's either as memjr suggests: 'buy a "better" board', or buy a Pi 5 official PSU and try that.
As an aside whilst we are talking about the 27W official PD Pi5 PSU. What a brilliant thing it is! Its easy to think its a boring 5V/5A psu for a Pi5 but actually its a lot more than that. From the documentation:
Why would you not want to buy such a useful thing if you are getting usb-c PD powered stuff? Again, apologies for the length of post if it offends.
However, sometimes the process doesn't go too well. For example when people respond to the OP asking what appear to be sensible, basic questions which would help to refine where the solution may lie. The OP can then seem to go to any lengths to avoid answering the people who are trying to help. Obviously when there are multiple native languages involved that may make things more difficult, but in many cases that's not the problem.
Then you get the posts where someone has a project with a specific aim, and they start down a particular path and things don't go well. Sometimes the answer is to go back to when things were going ok, then step sideways to a different path. Occasionally the aim is unachievable with the technology employed. Sometimes you need to go back to the beginning. Sometimes you need to stop digging and look carefully at the hole (or sometimes the whole) In this case it unfortunate to not have bought a Pi5 psu.
In this case, the OP may of course have purchased a broken Pi 5, after all its bound to happen occasionally. Alternatively they may have damaged it mechanically or by ESD when puttng it in the case, for example. In either of those situations only swapping the pi will fix it, and may mean buying a new one. But lets assume that's not where we are.
I notice he mentions the case has a pwm fan, but he doesn't say which case it is. If it were an Argon one V3 for example, did the daughter board that moves the usb-c power socket to the back connect properly to the pi 5 (I have seen comments about that can be tricky)? Is the power budget of the pi4 psu enough to supply the pi5, whatever the case has in it and its fan.
If it were me in this situation, I would have bought the new Pi5 with a new Pi5 psu (as its a relatively small extra cost), as I could then easily continue to use the Pi 4 for something else. He hasn't mentioned why he was seemingly willing to set aside Pi4. Could it be it became unreliable? Could that have been a faulty PSU? Not seen any complaints about RPi psu reliability, and I haven't personally had any problems, but its possible. With only one psu, hard to tell. Is the mains supply the psu is plugged into reliable?
Unfortunately not even removing the case is easy as there probably aren't spare thermal pads to reassemble it properly. In many ways it would be good to just have the Pi5, a usb mouse and usb keyboard and monitor with the Pi4 Psu to run with for long enough to establish whether that works ok. As we don't seem to be able to get there then, if it's nothing mentioned above, as far as I can tell it's either as memjr suggests: 'buy a "better" board', or buy a Pi 5 official PSU and try that.
As an aside whilst we are talking about the 27W official PD Pi5 PSU. What a brilliant thing it is! Its easy to think its a boring 5V/5A psu for a Pi5 but actually its a lot more than that. From the documentation:
Additional built-in power profiles mean the Raspberry Pi 27W USB-C Power Supply is also an excellent option for powering third-party PD-compatible products. The available profiles are 9V, 3A; 12V, 2.25A; and 15V, 1.8A, all limited to a maximum of 27W.
As an example I wanted to run a Pi5 from a 12v battery and chose a 52Pi pi5 PD board to do that. That board also has a usb-c PD power in. For debugging I thought will it run indoors from the Pi5 psu? Sure enough it negotiated 15V 1.8A (=27W) and the Pi was happy it had full power with no editing. (You must not use both power inputs on the 52Pi at once).
Why would you not want to buy such a useful thing if you are getting usb-c PD powered stuff? Again, apologies for the length of post if it offends.
Statistics: Posted by Pi5_User — Fri Jan 03, 2025 1:09 am