Raspberry Pi Won't Start

[DrKat123]

yes, I have read the Sticky but it didn't give me much help about my issue
My Raspberry Pi 3 model B has been used for quite a while.
But yesterday, while I was using the Raspberry Pi, it turned off on it's own. I thought there was something wrong with the HDMI cable but the cable is plugged in correctly.

[MaxK1]

It wouldn't be the first time a 5V/2.5A power supply degenerated to the point where a pi failed to boot. The label on the PSU only tells you what it SUPPOSED to deliver. A meter will tell you what it is actually delivering... (I have a box full of power supplies that started life as 5+V and now deliver anywhere from 0V to 4.2V after anywhere from 1 day to 3+ years. One of these days I'll get around to busting them open and figuring out why they failed...)

The green LED is NOT the power LED, btw. If there is no red LED, then the PSU isn't delivering at least ~4.65V to the pi.

[DrKat123]

Ah, so I've been mixing the PWR and the ACT led this whole time

I have tried to rewrite the SDCard with a new image of Raspbian, it works, but only for a few days
Recently, it seems to have shut down on it's own, there's nothing on the display but the red PWR and the green ACT light is on
The mouse and the keyboard does not seem to function.

EDIT: Also, my (micro)SDcard is this one

[FTrevorGowen]

Ah, so I've been mixing the PWR and the ACT led this whole time
...

Just to clarify (if the above was true) - how, exactly, have you been shutting down? After either using a "GUI button/Menu command" from the Desktop, or using (something like) sudo shutdown -h now within a terminal, SSH login shell or the command line, did you wait until all green led ACTivity ceased (usually ~10 flashes) and just a steady RED PoWeR led on before removing power? (Not doing so repeatedly can eventually lead to SD card (file) corruption - AIUI the "10 flashes" are associated with the final "synching" of (pending) writes to the SD card) Does the RED PoWeR led ever flash?
Trev.

[DrKat123]

Ah, so I've been mixing the PWR and the ACT led this whole time
...

Just to clarify (if the above was true) - how, exactly, have you been shutting down? After either using a "GUI button/Menu command" from the Desktop, or using (something like) sudo shutdown -h now within a terminal, SSH login shell or the command line, did you wait until all green led ACTivity ceased (usually ~10 flashes) and just a steady RED PoWeR led on before removing power? (Not doing so repeatedly can eventually lead to SD card (file) corruption - AIUI the "10 flashes" are associated with the final "synching" of (pending) writes to the SD card) Does the RED PoWeR led ever flash?
Trev.

Yes, i've waited for the ACT light to turn off
The PWR led never flash
Also, I use sudo halt

[drgeoff]

(I have a box full of power supplies that started life as 5+V and now deliver anywhere from 0V to 4.2V after anywhere from 1 day to 3+ years. One of these days I'll get around to busting them open and figuring out why they failed...)

If they are giving a reasonable fraction of the rated voltage when measured with no load and it falls significantly when loaded, the cause is almost always the electrolytics on the output of the high frequency rectifier.

Replacement capacitors are only a few tens of pence but many supplies are in glued/welded enclosures. Opening them up is one thing but putting them back together such that they remain safe to use is another!

[MaxK1]

I'm assuming they weren't safe to use in the first place I'm really expecting some of them will be scarrier than anything on late night TV on halloween. Some of the videos/images I've seen show underated parts, scary AC connections and so on... I probably won't be repairing any that are, ahem, under-engineered.

[DrKat123]

Okay, it has happened again
I was using my raspberry pi (trying to install composer) and suddenly it seems to have "shut down"
I have to unplug the power supply (which means possibly corrupting the SD...) and plug it back again, and the ACT light won't turn on

[MaxK1]

How are you powering the Pi? Any chance the power connector is a bit loose? What PSU are you using? Are you over-clocking?
What is connected to it besides keyboard/mouse and the HDMI display? Where were you on the night of the 5th between 8 and 10.... Sorry - too many TV crime shows Anything on the board feeling hot (too hot to touch for more than a couple of seconds)?

And finally, do you have any test equipment available?

[DrKat123]

How are you powering the Pi? Any chance the power connector is a bit loose? What PSU are you using? Are you over-clocking?
What is connected to it besides keyboard/mouse and the HDMI display? Where were you on the night of the 5th between 8 and 10.... Sorry - too many TV crime shows Anything on the board feeling hot (too hot to touch for more than a couple of seconds)?

And finally, do you have any test equipment available?

I'm powering the Pi with a 2.5 A 5V power supply (not official), it isn't loose, I'm not overclocking, it's (the raspberry pi) connected to a Toshiba mouse and a keyboard, a HDMI cable and a Toshiba 8GB USB, the board's temperature usually ranges from 39 °C to 55°C
Also, I'm sure we have a multimeter somewhere

[MaxK1]

Wired or wifi connection?

Right now my gut is saying power problem, but just to cover more bases: Does the system have enough space on the SD card?
What about memory split?

[DrKat123]

Wired or wifi connection?

Right now my gut is saying power problem, but just to cover more bases: Does the system have enough space on the SD card?
What about memory split?

WiFi.
I have a 16 GB microSDCard.
Shared 64 mb memory for GPU

[MaxK1]

How much free space on the card?

[steveb4pi]

After hours of checking voltages and swapping USB chargers (and trearing my hair out) I discovered why my Pi kept crashing .

IT'S THE USELESS MICRO-USB SOCKET on the Pi PCB ..

After a few dozen insert/removals the socket gets so loose that the power plug virtually falls out under it's own weight and the slightest touch can disconect the power ...

A temp 'fix' was to use a rubber band to put some pressure on the plug/socket (my perm. fix was to chop off the plug and solder the power wires directly to the board ...)

[RaTTuS]

the micro usb sockets[where chosen because they can cope with 100's of thousands insertions,
if your power adapter one is slightly too big or you have been really rough with it it may fail
but the ones on the board should last a long time

[FTrevorGowen]

the micro usb sockets[where chosen because they can cope with 100's of thousands insertions,
if your power adapter one is slightly too big or you have been really rough with it it may fail
but the ones on the board should last a long time

+1 W.r.t. uUSB plugs & sockets in general - it's usually the plug that "fails", to date** I've had two uUSB cable plugs "fail" to stay inserted in a uUSB socket (IIRC, one in a mobile phone, the other may have been in a Pi) but, once the cable was replaced everything continued to work fine. (IIRC, when I commented about this in an ancient post @jamesh also had experienced similar plug failure)
Trev.
**since early 2012

[MaxK1]

The sockets on the Pi's aren't the problem, it's the plugs on the cheap cables/chargers that have given me problems in the past. Within a week of those problems when I got my first Pi (May 2012) I had started using Pins 2/6 and 5V 3A and 6A supplies scrounged up at a local surplus store.

[DrKat123]

How much free space on the card?

Probably 12 GBs

I tried to boot using a different SDcard this morning, but I get the same error (shuts down on it's own, ACT light didn't blink, PWR light stays on and cannot boot)

Also, the problem might not be with the power supply

[MaxK1]

Anything connected to either the GPIO header or the "run" (reset) pads? (stray spikes from an IKEA desk lamp being turned on or off cause one of my Pi3 to crash. Moving the desk lamp away from the Pi cures that.)
Is anything on the board too hot to touch after a few seconds?
What else is connected besides keyboard/mouse (and HDMI)?

[DrKat123]

Anything connected to either the GPIO header or the "run" (reset) pads? (stray spikes from an IKEA desk lamp being turned on or off cause one of my Pi3 to crash. Moving the desk lamp away from the Pi cures that.)
Is anything on the board too hot to touch after a few seconds?
What else is connected besides keyboard/mouse (and HDMI)?

Nothing is connected to the GPIO or the reset pad, the CPU is moderately warm
And I don't connect anything else besides the keyboard, mouse, HDMI, power supply (and sometimes the usb)

[DrKat123]

Bump

[MaxK1]

is it fully up to date?

I still think this is a power related issue.

[DrKat123]

is it fully up to date?

I still think this is a power related issue.

It is a Raspberry Pi 3 model B, with Raspbian Jessie (2016-09-23) and the latest firmware

[DrKat123]

Bump
Is nobody paying attention to this?

[DrKat123]

Bump