When i start rpi the temperature of cpu will increase rapidly （less than 2 seconds），
and the rpi can also work ，but a little slow，
How does this happen？
Is there anything wrong with the hardware?
how to repair it？
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RaTTuS
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Re: CPU overheating
what have you plugged into your RPI on the GPIO ?
RPI's are not repairable
you possibly have shorted or overloaded the GPIO and have caused permanent damage
RPI's are not repairable
you possibly have shorted or overloaded the GPIO and have caused permanent damage
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ShiftPlusOne
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Re: CPU overheating
How have you determined that it's overheating? What's the measured temperature?
Re: CPU overheating
RaTTuS wrote:what have you plugged into your RPI on the GPIO ?
RPI's are not repairable
you possibly have shorted or overloaded the GPIO and have caused permanent damage
i have a sim card moudle and an usb to ttl card ， but the sim card moudle has individual power supply,
Re: CPU overheating
i have a simple temperature detection device , when the rpi start , the temperature will increase to 68 in 2 secShiftPlusOne wrote:How have you determined that it's overheating? What's the measured temperature?
Re: CPU overheating
It is better to measure the internal temperature with the command vcgencmd measure_tempkscorpio wrote:i have a simple temperature detection device
Code: Select all
rpdom@raspi4:~$ vcgencmd measure_temp
temp=21.3'C
Re: CPU overheating
The reason behind the over heatind may be slow speed of fan or sometimes your fan stops.... you should check when computer starts..
Re: CPU overheating
Fan? What fan? Why would there be a fan?dhada wrote:The reason behind the over heatind may be slow speed of fan or sometimes your fan stops.... you should check when computer starts..
Re: CPU overheating
Do you have a multimeter and know how to check voltages? If so, does the sim card module feed power into the Pi? If so, how much?kscorpio wrote:i have a sim card moudle and an usb to ttl card ， but the sim card moudle has individual power supply,
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RaTTuS
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Re: CPU overheating
post links to thse things you have plugged in and exactly how they are plugged in
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DougieLawson
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Re: CPU overheating
68°F isn't a problem. 68°C may show that there's something wrong and the magic smoke is due to make a bid for freedom.kscorpio wrote:i have a simple temperature detection device , when the rpi start , the temperature will increase to 68 in 2 secShiftPlusOne wrote:How have you determined that it's overheating? What's the measured temperature?
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Re: CPU overheating
It wouldn't be a problem, but it would be a bleedin' miracle unless it's sitting inside a fridge freezer box!DougieLawson wrote:68°F isn't a problem.
Pi2B Mini-PC/Media Centre: ARM=1GHz (+3), Core=500MHz, v3d=500MHz, h264=333MHz, RAM=DDR2-1200 (+6/+4/+4+schmoo). Sandisk Ultra HC-I 32GB microSD card on '50=100' OCed slot (42MB/s read) running Raspbian/KODI16, Seagate 3.5" 1.5TB HDD mass storage.
Re: CPU overheating
GTR2Fan wrote:It wouldn't be a problem, but it would be a bleedin' miracle unless it's sitting inside a fridge freezer box!DougieLawson wrote:68°F isn't a problem.
Isn't far off 68Frpdom wrote: rpdom@raspi4:~$ vcgencmd measure_temp
temp=21.3'C
Re: CPU overheating
Wow! Where's that one? None of the 5 Pi I've played with so far have idled any lower than 20°C above ambient on standard clocks and uncased.asandford wrote:Isn't far off 68F
Pi2B Mini-PC/Media Centre: ARM=1GHz (+3), Core=500MHz, v3d=500MHz, h264=333MHz, RAM=DDR2-1200 (+6/+4/+4+schmoo). Sandisk Ultra HC-I 32GB microSD card on '50=100' OCed slot (42MB/s read) running Raspbian/KODI16, Seagate 3.5" 1.5TB HDD mass storage.
Re: CPU overheating
rpdom appears to be in Essex.GTR2Fan wrote:Wow! Where's that one? None of the 5 Pi I've played with so far have idled any lower than 20°C above ambient on standard clocks and uncased.asandford wrote:Isn't far off 68F
Re: CPU overheating
That's correct.asandford wrote:rpdom appears to be in Essex.
That particular Pi (Model A) is in a unheated building. It is running with no overclocking. It is in a case. The ambient in there was around 3°C at the time.
Another Pi, at ambient of around 17°C is currently at 34.7°C.