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raspberrypi DOA?
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Julian Macassey
Apr 14, 2013, 2:05:44 PM4/14/13
to
I have two raspberrypi Model Bs that seem to be DOA. When
I plug in the SD card, Ethernet cable and power, I just get the
Red Power LED to light. Nothing else. I have a raspberrypi A that
works fine. I have swapped SD cards, Power supplies and ethernet
cable between all three. The cards certainly seem dead.
Is this a common problem?
Have I done something stupid?
I plug in the SD card, Ethernet cable and power, I just get the
Red Power LED to light. Nothing else. I have a raspberrypi A that
works fine. I have swapped SD cards, Power supplies and ethernet
cable between all three. The cards certainly seem dead.
Is this a common problem?
Have I done something stupid?
James Harris
Apr 14, 2013, 2:57:51 PM4/14/13
to
James
Brian Reay
Apr 14, 2013, 3:56:16 PM4/14/13
to
say not.
Are you sure your PSU is good, in particular that is can supply enough
current.
Brian
Julian Macassey
Apr 14, 2013, 4:16:20 PM4/14/13
to
http://www.adafruit.com/products/501
--
The Rasberrypi. Get yours too. raspberrypi.org
Tauno Voipio
Apr 14, 2013, 4:31:30 PM4/14/13
to
I had one with a broken side. It did work as long as I pushed
the card to the contacts from the top of the card.
--
Tauno Voipio
Jim Price
Apr 14, 2013, 4:32:11 PM4/14/13
to
plugged into the USB ports, anything above 700ma should get the Pi
booting. My B runs fine off the USB port on the back of an LG TV with a
wireless keyboard and wireless remote control transceivers plugged in.
--
╔═╦═╦═════╦═══╗
║ ║ ║ ║ ║
╔═╝ ║ ║ ║ ║ ║ ╔═╝
╚═══╩═╩═╩═╩═╩═╝ -- JimP.
Martin Gregorie
Apr 14, 2013, 5:12:47 PM4/14/13
to
that its white and has a UK 3 pin base. Its a Chinese no-brand unit with
a type code of CAB5201. Input is 100-240v 60/50 Hz 150mA, output is 5v at
1000mA. I just swapped my Farnell-supplied charger for it and booted my
RPi off it with no problems, ran top and df, saw exactly what I expected
to see and shut it down. I have a 512MB model B which I'm running
headless over Ethernet via SSH, i.e. there is no USB power use at all.
HTH
--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |
Julian Macassey
Apr 14, 2013, 6:45:17 PM4/14/13
to
On Sun, 14 Apr 2013 23:31:30 +0300, Tauno Voipio
<tauno....@notused.fi.invalid> wrote:
>
> Check the side earlets holding the SD card against the contacts.
> I had one with a broken side. It did work as long as I pushed
> the card to the contacts from the top of the card.
Checked that. Seating nicely.
<tauno....@notused.fi.invalid> wrote:
>
> Check the side earlets holding the SD card against the contacts.
> I had one with a broken side. It did work as long as I pushed
> the card to the contacts from the top of the card.
James Harris
Apr 14, 2013, 7:26:41 PM4/14/13
to
On Apr 14, 9:16 pm, Julian Macassey <jul...@tele.com> wrote:
> On Sun, 14 Apr 2013 11:57:51 -0700 (PDT), James Harris
>
> On Sun, 14 Apr 2013 11:57:51 -0700 (PDT), James Harris
>
> <james.harri...@gmail.com> wrote:
> > On Apr 14, 7:05 pm, Julian Macassey <jul...@tele.com> wrote:
> >> I have two raspberrypi Model Bs that seem to be DOA. When
> >> I plug in the SD card, Ethernet cable and power, I just get the
> >> Red Power LED to light. Nothing else. I have a raspberrypi A that
> >> works fine. I have swapped SD cards, Power supplies and ethernet
> >> cable between all three. The cards certainly seem dead.
>
> >> Is this a common problem?
>
> >> Have I done something stupid?
>
> > Power supply issue? Model B requires more current than Model A.
>
> Using the 1 Amp PSU from adafruit.
>
> http://www.adafruit.com/products/501
That sounds enough - as long as your PSU matches its spec.
> > On Apr 14, 7:05 pm, Julian Macassey <jul...@tele.com> wrote:
> >> I have two raspberrypi Model Bs that seem to be DOA. When
> >> I plug in the SD card, Ethernet cable and power, I just get the
> >> Red Power LED to light. Nothing else. I have a raspberrypi A that
> >> works fine. I have swapped SD cards, Power supplies and ethernet
> >> cable between all three. The cards certainly seem dead.
>
> >> Is this a common problem?
>
> >> Have I done something stupid?
>
> > Power supply issue? Model B requires more current than Model A.
>
> Using the 1 Amp PSU from adafruit.
>
> http://www.adafruit.com/products/501
By the way, when you say you have swapped the Ethernet cable I presume
you mean the video cable. AIUI Model A doesn't have an Ethernet port.
James
Julian Macassey
Apr 14, 2013, 9:36:09 PM4/14/13
to
the 500M RAM models.
Jim Price
Apr 14, 2013, 10:02:36 PM4/14/13
to
one of the early ones, try leaving some hours between testing it to give
the fuses time to reset.
--
╔═╦═╦═════╦═══╗
║ ║ ║ ║ ║
╔═╝ ║ ║ ║ ║ ║ ╔═╝
╚═══╩═╩═╩═╩═╩═╝ -- JimP.
Miguel Giménez
Apr 15, 2013, 8:34:35 AM4/15/13
to
(it was made with iron instead of copper) and my Rpi B showed only an
oscillating power LED, refusing to boot. Found the cause, changed the
cable and everything went fine.
--
Saludos
Miguel Giménez
James Harris
Apr 15, 2013, 9:30:32 AM4/15/13
to
On Apr 15, 2:36 am, Julian Macassey <jul...@tele.com> wrote:
> On Sun, 14 Apr 2013 16:26:41 -0700 (PDT), James Harris
>
>
>
> On Sun, 14 Apr 2013 16:26:41 -0700 (PDT), James Harris
>
>
>
> <james.harri...@gmail.com> wrote:
> > On Apr 14, 9:16 pm, Julian Macassey <jul...@tele.com> wrote:
> >> On Sun, 14 Apr 2013 11:57:51 -0700 (PDT), James Harris
>
> >> <james.harri...@gmail.com> wrote:
> >> > On Apr 14, 7:05 pm, Julian Macassey <jul...@tele.com> wrote:
> >> >> I have two raspberrypi Model Bs that seem to be DOA. When
> >> >> I plug in the SD card, Ethernet cable and power, I just get the
> >> >> Red Power LED to light. Nothing else. I have a raspberrypi A that
> >> >> works fine. I have swapped SD cards, Power supplies and ethernet
> >> >> cable between all three. The cards certainly seem dead.
>
> >> >> Is this a common problem?
>
> >> >> Have I done something stupid?
>
> >> > Power supply issue? Model B requires more current than Model A.
>
> >> Using the 1 Amp PSU from adafruit.
>
> >> http://www.adafruit.com/products/501
>
> > That sounds enough - as long as your PSU matches its spec.
>
> > By the way, when you say you have swapped the Ethernet cable I presume
> > you mean the video cable. AIUI Model A doesn't have an Ethernet port.
>
> By model A I mean the 256M RAM model, the other two are
> the 500M RAM models.
Ah - if it has an ethernet port it is NOT a Model A. It is probably a
> > On Apr 14, 9:16 pm, Julian Macassey <jul...@tele.com> wrote:
> >> On Sun, 14 Apr 2013 11:57:51 -0700 (PDT), James Harris
>
> >> <james.harri...@gmail.com> wrote:
> >> > On Apr 14, 7:05 pm, Julian Macassey <jul...@tele.com> wrote:
> >> >> I have two raspberrypi Model Bs that seem to be DOA. When
> >> >> I plug in the SD card, Ethernet cable and power, I just get the
> >> >> Red Power LED to light. Nothing else. I have a raspberrypi A that
> >> >> works fine. I have swapped SD cards, Power supplies and ethernet
> >> >> cable between all three. The cards certainly seem dead.
>
> >> >> Is this a common problem?
>
> >> >> Have I done something stupid?
>
> >> > Power supply issue? Model B requires more current than Model A.
>
> >> Using the 1 Amp PSU from adafruit.
>
> >> http://www.adafruit.com/products/501
>
> > That sounds enough - as long as your PSU matches its spec.
>
> > By the way, when you say you have swapped the Ethernet cable I presume
> > you mean the video cable. AIUI Model A doesn't have an Ethernet port.
>
> By model A I mean the 256M RAM model, the other two are
> the 500M RAM models.
Model B early revision so ignore my earlier comments about power.
There may be some but I'm not aware of any extra power requirement for
later Model Bs.
James
expaddler
Apr 15, 2013, 10:42:45 AM4/15/13
to
Jasen Betts
Apr 16, 2013, 6:07:15 AM4/16/13
to
extra IO terminals which could if you connect them to something and
mounting holes which almost certainly don't.
--
⚂⚃ 100% natural
Gordon Henderson
Apr 16, 2013, 4:57:44 PM4/16/13
to
In article <kkj7sj$msa$1...@gonzo.reversiblemaps.ath.cx>,
The Model A is Rev 2 and it has the same original 256MB of RAM, and the
very first batch of Rev 2's still only had 256MB, so there are some Rev
2 Model B's with 256MB.
Gordon
Jasen Betts <ja...@xnet.co.nz> wrote:
>Revsion 2 has a larger RAM chip which may consume a little more power,
>extra IO terminals which could if you connect them to something and
>mounting holes which almost certainly don't.
To confuse matters, not all Rev 2's have more RAM.
>Revsion 2 has a larger RAM chip which may consume a little more power,
>extra IO terminals which could if you connect them to something and
>mounting holes which almost certainly don't.
The Model A is Rev 2 and it has the same original 256MB of RAM, and the
very first batch of Rev 2's still only had 256MB, so there are some Rev
2 Model B's with 256MB.
Gordon
Bob Martin
Apr 17, 2013, 1:32:24 AM4/17/13
to
bought in February.
Julian Macassey
Apr 18, 2013, 7:25:09 PM4/18/13
to
have newer ones with 50M that don't work. I just plugged in a new
one 500M that does work. Yes, I have swapped, power supplies, SD
cards and Ethernet connections. The dead ones are dead.
James Harris
Apr 19, 2013, 3:24:59 AM4/19/13
to
On Apr 19, 12:25 am, Julian Macassey <jul...@tele.com> wrote:
...
> > My model B has 256MB RAM. That's what all the first batch had. If it is
> > one of the early ones, try leaving some hours between testing it to give
> > the fuses time to reset.
(A side note on the fuses: http://elinux.org/Polyfuses_explained.)
> I have one old one with 256MB of RAM that does work. I
> have newer ones with 50M that don't work. I just plugged in a new
> one 500M that does work. Yes, I have swapped, power supplies, SD
> cards and Ethernet connections. The dead ones are dead.
What did you think of the reply by "expaddler" in this thread? I
notice you didn't reply to that post but it sounded a possible cause
of the problems you are seeing.
James
...
> > My model B has 256MB RAM. That's what all the first batch had. If it is
> > one of the early ones, try leaving some hours between testing it to give
> > the fuses time to reset.
> I have one old one with 256MB of RAM that does work. I
> have newer ones with 50M that don't work. I just plugged in a new
> one 500M that does work. Yes, I have swapped, power supplies, SD
> cards and Ethernet connections. The dead ones are dead.
notice you didn't reply to that post but it sounded a possible cause
of the problems you are seeing.
James
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