Haswellpi
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Usb on rpi doesn't have power what to do?

Sun Mar 09, 2014 11:36 pm

So i have recetly bought raspberry pi and all works well till today when i was trying to install pidora on raspberry pi and my mouse and keyboard don't work.When i put my mouse in to the usb port i see fast red blink on mouse just once and it doesn't have power i am using 2A power and rpi model B, my mouse don't take more than 500mA about 100mA please help? Thanks to all.

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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 5:09 am

First of all, there is no way a Pi will deliver 500mA to a USB port. You'd trip the F3 polyfuse before that happened.

At 100mA, you should be okay. The original versions of the board (Rev. 1.1) had 140mA polyfuses on each USB port. I still run boards of that version with mouse and keyboard with no problems. but I stick to simple, no frills, keyboards (no lights, no USB hub, etc.). Likewise, I use plain mice.

Best first suggestion would be to check the voltage across TP1 and TP2 to see if the Pi itself is being properly powered. Your Pi may have plenty of current to run and power the USB devices, but not enough voltage to keep them working.

Haswellpi
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 12:58 pm

I checked my tp1 and tp2 it is 4.8V but still i dont have a power for usb mouse or keyboard please help me.thanks to all

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redhawk
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 1:22 pm

Keyboard and mouses don't require a lot of power if they're not working then your USB/LAN controller IC may not be working.

Does the black chip (IC3) opposite the USB ports get warm or no change in temperature??

If your mouse optical does it emit a red beam from it's bottom??

On the back of the board look for the metal slab (X1) with 25.000 (25MHz XTAL) give it a light tap, now boot up the Pi and check the keyboard / mouse again.

Richard S.

Haswellpi
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 1:37 pm

First of all thaks to help. Red emitter on mouse blink once fast and when i put usb in usb port,ic3 chip is not that hot,i give a little shout at metal at the back but still mouse and keyboard don't work.

Haswellpi
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 2:04 pm

Anyone had an idea what could be???

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redhawk
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 3:02 pm

What are you running, NOOBS or something??

Could you try re-flashing your SD Card or if your using NOOBS try flashing the RAW images instead with Win32DiskImager.

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Haswellpi
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 3:05 pm

I am not running anything i am trying to install pidora!thanks

Pi_Fanatic
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 3:11 pm

It sounds like possibly the mouse and keyboard are not paired with the USB adaptor. Does the keyboard have a small round button on the bottom that you would have to push to pair the keyboard with the USB adaptor ? The mouse will not emit any light (i.e. optical) unless it is actively getting a request from the Pi.

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Haswellpi
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 3:14 pm

The mouse and keyboard are wired.

Haswellpi
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 3:35 pm

I will now post a video


Haswellpi
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 4:14 pm

Here is a video

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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 4:21 pm

Rather than installing Pidora, can you install Raspbian? Either from NOOBS or a raw image. Just to confirm is there is a problem with the board rather than the install.
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Haswellpi
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 4:25 pm

I was trying to install raspbian and noobs.
On raspbian says the disk was not properly unmounted please run fsck.
And when i try to install noobs nothing show on tv thanks for help

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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 4:31 pm

Let's go back to basics, Noobs is not something you install - it is the image. Reflash your card with Noobs and startup the Pi with keyboard only plugged in. If working properly the system will boot to the menu screen where you pick which O/S to install. If the keyboard is working properly, you should be able to use the Up/Down arrow keys to scroll through the menu choices.

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Haswellpi
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 4:33 pm

I know i do just like you said but nothing showsvon the screen

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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 4:35 pm

what display
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Haswellpi
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 4:38 pm

Old tv on rgb

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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 4:45 pm

The Pi doesn't output RGB.
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Haswellpi
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 4:48 pm

I am using video out not an hdmi

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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 4:48 pm

Haswellpi wrote:Old tv on rgb
If by "on rgb" you mean you're trying to use composite video via the yellow RCA connector together with a "NOOBS-based" installation you need to select composite video by pressing/toggling key '3' or '4' (as per the NOOBS instructions:
http://www.raspberrypi.org/downloads ) and make that mode "permanent", as shown here:
http://www.cpmspectrepi.webspace.virgin ... ellow.html
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redhawk
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 4:53 pm

I assume the OP was referring to CRT and not RGB although if he's using a SCART adapter then composite will be carried into the TV as one of the pins.
As for the YouTube video it's clear there is power coming from the USB port, the mouse's beam this isn't always at full power sometimes if idle / no movement detected the beam is less intense.
For NOOBS you need to press 2 or 3 to enable composite video mode (sometimes Esc or Enter must be pressed beforehand to dismiss error message box).

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Haswellpi
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 5:06 pm

I install noobs on sd card put into pi,turn pi on but i cant click any key on keyboard because as you can see on video i dont have power coming out from pi's ports thanks to all

Haswellpi
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Re: Usb on rpi doesn't have power what to do?

Mon Mar 10, 2014 5:12 pm

What do i need to do?

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