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Pi2B red/green LEDs stuck on, no boot

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  Pi2B red/green LEDs stuck on, no boot bp@www.zefox.net - 2026-07-02 14:56 +0000
    Re: Pi2B red/green LEDs stuck on, no boot bp@www.zefox.net - 2026-07-02 15:26 +0000
      Re: Pi2B red/green LEDs stuck on, no boot Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-03 00:28 +0000
    Re: Pi2B red/green LEDs stuck on, no boot The Natural Philosopher <tnp@invalid.invalid> - 2026-07-02 17:51 +0100
    Re: Pi2B red/green LEDs stuck on, no boot druck <news@druck.org.uk> - 2026-07-02 19:38 +0100
      Re: Pi2B red/green LEDs stuck on, no boot Brian Gregory <void-invalid-dead-dontuse@email.invalid> - 2026-07-02 20:55 +0100
    Re: Pi2B red/green LEDs stuck on, no boot druck <news@druck.org.uk> - 2026-07-02 19:38 +0100

#38160 — Pi2B red/green LEDs stuck on, no boot

An elderly Pi2B v1.1 seems to have quit running. On power cycle
both red and green status LEDs stay on, no flashes. Roughly one
screen of boot output appears, then the screen goes blank and 
the monitor enters sleep mode. Re-seating
the microSD card has no effect, unseating the microSD card has
no effect, swapping the microSD card has no effect. 

Plugging a usb cable into the usb ports and connecting a voltmeter
to the red and black wires shows an initial 5 volts, then zero,
then 5 volts after a few seconds. Putting the meter on the power
supply leads shows 5 volts steady.

If I power cycle the Pi2 while the monitor remains powered 
and only a USB keyboard is connected the monitor shows the
rainbow screen, about a page and a half of boot output, then
blanks and enters "no signal" mode. The keyboard responds
to caps lock.

Can anybody suggest other things to test? 

Thanks for reading,

bob prohaska

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#38161

Looks like the HDMI-DVI adapter was loose. It somehow allowed
the first part of the boot message but cut off the rest......

Sorry for the noise!

bob prohaska

bp@www.zefox.net wrote:
> An elderly Pi2B v1.1 seems to have quit running. On power cycle
> both red and green status LEDs stay on, no flashes. Roughly one
> screen of boot output appears, then the screen goes blank and 
> the monitor enters sleep mode. Re-seating
> the microSD card has no effect, unseating the microSD card has
> no effect, swapping the microSD card has no effect. 
> 
> Plugging a usb cable into the usb ports and connecting a voltmeter
> to the red and black wires shows an initial 5 volts, then zero,
> then 5 volts after a few seconds. Putting the meter on the power
> supply leads shows 5 volts steady.
> 
> If I power cycle the Pi2 while the monitor remains powered 
> and only a USB keyboard is connected the monitor shows the
> rainbow screen, about a page and a half of boot output, then
> blanks and enters "no signal" mode. The keyboard responds
> to caps lock.
> 
> Can anybody suggest other things to test? 
> 
> Thanks for reading,
> 
> bob prohaska
> 

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#38166

On Thu, 2 Jul 2026 15:26:00 -0000 (UTC), bp wrote:

> Looks like the HDMI-DVI adapter was loose. It somehow allowed the
> first part of the boot message but cut off the rest......

Hah! I think I have an occasional problem like that, too. (Possibly
loose HDMI cable, in my case.)

In my case the machine (a streamer box in the living room) is on
pretty much all the time, so the manifestation is the video signal
occasionally disappears completely.

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#38162

On 02/07/2026 15:56, bp@www.zefox.net wrote:
> An elderly Pi2B v1.1 seems to have quit running. On power cycle
> both red and green status LEDs stay on, no flashes. Roughly one
> screen of boot output appears, then the screen goes blank and
> the monitor enters sleep mode. Re-seating
> the microSD card has no effect, unseating the microSD card has
> no effect, swapping the microSD card has no effect.
> 
> Plugging a usb cable into the usb ports and connecting a voltmeter
> to the red and black wires shows an initial 5 volts, then zero,
> then 5 volts after a few seconds. Putting the meter on the power
> supply leads shows 5 volts steady.
> 
> If I power cycle the Pi2 while the monitor remains powered
> and only a USB keyboard is connected the monitor shows the
> rainbow screen, about a page and a half of boot output, then
> blanks and enters "no signal" mode. The keyboard responds
> to caps lock.
> 
> Can anybody suggest other things to test?
> 
> Thanks for reading,
> 
> bob prohaska
> 
Sadly unless you want to drag out the hot ait station and the microscope 
I'd say it was cattled.
Rhyming slang.
...Cattle truck....
-- 
"The most difficult subjects can be explained to the most slow witted 
man if he has not formed any idea of them already; but the simplest 
thing cannot be made clear to the most intelligent man if he is firmly 
persuaded that he knows already, without a shadow of doubt, what is laid 
before him."

    - Leo Tolstoy

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#38163

On 02/07/2026 15:56, bp@www.zefox.net wrote:
> An elderly Pi2B v1.1 seems to have quit running.

[Snip]

Glad you have found the cause, and this wouldn't have helped but for 
reference.

> Can anybody suggest other things to test?
The very first thing to try is a fresh install on a new SD card.

---druck

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#38165

On 02/07/2026 19:38, druck wrote:
> The very first thing to try is a fresh install on a new SD card.

Remembering that you need a 32 bit (not 64 bit) version of your chosen OS.

-- 
Brian Gregory (in England).

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#38164

On 02/07/2026 15:56, bp@www.zefox.net wrote:
> An elderly Pi2B v1.1 seems to have quit running.

[Snip]

Glad you have found the cause, and this wouldn't have helped but for 
reference.

> Can anybody suggest other things to test?
The very first thing to try is a fresh install on a new SD card.

---druck

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