Pi won't boot with noise and PWR lit only

Can someone describe the sound?  I don't have speakers handy.

RasPi doesn't have anything that should be making a sound, so if it is something is broken.  I recommend checking various voltages with a multimeter: 5V, 3.3V, 1.8V, etc.  A stethoscope or even a drinking straw might help localize where the sound is coming from.

It is a high pitched voice. After some googling, I believe that my situation is somewhat like this(except that my pwr will always lit) https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=124239 I'll get myself a multimeter later as well as to boot the pi up from gpio

It is a high pitched voice. After some googling, I believe that my situation is somewhat like this(except that my pwr will always lit) https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=124239 I'll get myself a multimeter later as well as to boot the pi up from gpio

wcy pierre wrote:

 

It is a high pitched voice. After some googling, I believe that my situation is somewhat like this(except that my pwr will always lit) https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=124239 I'll get myself a multimeter later as well as to boot the pi up from gpio

A high-pitched screech (or whine, depending on how sensitive your ears are) is probably one of the inductors L1 or L2.  As mahjongg suggests at the link, it could be that the switching regulator is overloaded.  This can happen if a chip fails with a short, and may not be repairable.  It could be a spec of conductive debris has shorted out a couple of pins, which might be able to be blown out with air.

I'll wait for a few days while I wait for my multimeter to arrive, and I get the feel that its dead too. I guess its a sign for me to a Pi2!

And if you don't mind, can you take a look at my other pi at the other thread (http://www.element14.com/community/message/171195/l/pi-pwr-off-but-others-are-on#171195)?

anyway, while waiting for my multimeter to come from China(which should arrive by the end of this week), I've realized that my other rpi can be powered by usb ttl cable while I was testing serial connection to my rpi(despite that I can't ssh into it because of the wifi adapter using too much of power I guess), but is the idea of powering up my "faulty" rpi uses the same concept?

I'm following this link:

https://learn.adafruit.com/adafruits-raspberry-pi-lesson-5-using-a-console-cable/connect-the-lead

EDIT: ontopic, I've tried it out and it still makes out the high pitched voice, so I guess that's it for my rpi? and to clarify, I'm only powering the pi via 5v gpio, and I'm not powering it up using usb as well.

EDIT: offtopic, but it is because of the wifi adapter using too much of power so I can't ssh into my other rpi, removed the wifi adapter and I can ssh into it.

Just an update, got the multimeter and I did the voltage test(RPi Hardware - eLinux.org ) and it seems normal though (5.16v). Did the test for the voltage coming from psu and after passing through the polyfuse(R-Pi Troubleshooting - eLinux.org ) and the difference is only 0.1v (5.16v vs 5.15v), which seems to be normal by referring to the links above. Any other ideas?

If you've been hearing sounds that sounds like a faulty DC-DC converter. The older Pi's don't have DC-DC converters in-board. So the sound probably came from the thing that was powering your Pi's. It could have damaged them beyond repair. A multimeter alone won't reveal what your supply rail looks like. Replace the supplies, if that doesn't resolve things then replace the Pi's..

wcy pierre wrote:

 

Just an update, got the multimeter and I did the voltage test(RPi Hardware - eLinux.org ) and it seems normal though (5.16v). Did the test for the voltage coming from psu and after passing through the polyfuse(R-Pi Troubleshooting - eLinux.org ) and the difference is only 0.1v (5.16v vs 5.15v), which seems to be normal by referring to the links above. Any other ideas?

When I commented earlier about L1 and L2 I had assumed you had a RasPi B+.  As Shabaz says, the original B didn't have switching regulators for 3.3V and 1.8V.  However, it does have a switching regulator for the low voltage that powers SoC internal logic.  This regulator is built into the SoC except for external inductor L5, so if L5 is loose you could get a whine.  The other possibility is a crystal.  If one of those is loose its vibration could stimulate an audible harmonic somewhere.  Some very early RasPis had trouble with crystals that weren't soldered on properly, so check the solder joints with a magnifier.

Since you have an original RasPi Model B, you can look at the schematics and check whether all the voltages are OK.

It is amazing how much confusion the Pi naming has caused over the years when responding to RPI issues. I thought it was common sense that ideally one aims to change model name/numbers in one dimension only, or have a reasonable numbering scheme with (say) series and other key attributes encoded within the numbering. But the Pi starts with nostalgia and 'Model A' and 'Model B' naming, and then hardware revisions encoded in revision number (the 'late' model B as I remember), and then appending an operator (the 'plus' variants) and then a version number (not a revision number) with the Pi 2, and removing the operator!

I've taken a glimpse at the schematics, and which are the ones that I should look into?

Exactly. Not to mention that, since Model A and Model B, B+ are referred Pi 1 Model A/B/B+ respectively, then there's also a weird numbering scheme where it goes from 1 to 2 and then back to 0?

Pi 1(A, B with multiple revisions, B+) -> Pi 2 -> Pi 0?