maxicorn
Posts: 5
Joined: Tue Aug 27, 2019 7:05 am

PI 4 PWR Led Flashing no boot, STICKY: Is your Pi not booting? Read throughugh

Fri Aug 30, 2019 10:17 am

My plan is to set up headless raspberry, via ssh or wireless using my LAN
I have the following HW:
From official distributor:
Rasberry PI 4 2GB
Official PI 4 Charger
Already have:
Ethernet cable
Samsung microSD card 8GB Class 10
Kingston microSD card 16GB Class 4
Kingston MicroSD Adapter

Status:
PI 4 PWR Led flashing, no ACT lad activity.

https://www.raspberrypi.org/forums/view ... p?p=437084 Read this post through 4 times

EEPROM content is corrupted?
- Just charger plugged in, no ACT led activity, PWR led flashing
Not blinking four times with nothing but the power connected (and no SD-card) implies that the bootloader is not working correctly and should be reinstalled using recovery.bin. see https://www.raspberrypi.org/documentati ... teeprom.md

- This sentence does not give any explicit information about the status of PWR led!


Never mind, let’s try to recover the bootloader!

I’m on Windows platform
1. Inserted the sd card with the SD Adapter to the laptop
2. Format the the Kingston 8GB microSD Card with Windows Formatter
a. File System FAT32
b. Allocation Unit size 4096bytes
c. Volume label: noob
d. Full format
3. Format the the Kingston 16B microSD Card with Official SD card formatter that is recommended on the official site
a. Overwrite format
b. CHS format size adjustment on
4. copy of recovery.bin in the first partition of an SD card, formatted to FAT32. (statement copied from the official site) to both 16GB and 8GB sdCards
5. It flashes the green LED rapidly (forever) upon success. No green led flashing in 5 min for both sdCard
6. SoC was not cold both time
7. PWR red led flashing in 5 min until charger off

-------------------------------------------------------------------------------------------
Read from sticky post

If you have one of the later PI PI's (2 or 3) which won't boot and it keeps stuck on the rainbow screen, while also displaying the under voltage (lightening bolt) icon, and/or the red LED flashing then you are simply using boot code that is too old.

Question: Is this statement valid for PI 4 too?


Still the under voltage icon in the rainbow screen -only- indicates you are using the wrong boot code, it probably doesn't at that point indicate a power fail. Due to the RPI3B+ new power chip, (which includes the under voltage detector) old software no longer will find under voltage info in the same I/O registers, as its now reads that info through I2C. This also means that the red power LED is now also under CPU control, so it can flash (even without a real power fail)

Question: Is this mean that RPI4 chip has the same feature, so that maybe there is problem with the boot code?

Tried simply to go for booting up raspbian-buster-lite

Downloaded the latest
Raspbian Buster Lite from https://www.raspberrypi.org/downloads/raspbian/
SHA-256: 9e5cf24ce483bb96e7736ea75ca422e3560e7b455eee63dd28f66fa1825db70e

Things I have done for getting bootable sd card (Way 1):
I’m on Windows platform
8. Inserted the sd card with the SD Adapter
9. Format the Samsung 8GB microSD Card with Windows Official formatter
a. File System FAT32
b. Allocation Unit size 4096bytes
c. Volume label: noob
d. Full format
10. Checked in Disk Management GUI the sd card:
a. has Primary Partition
b. is healthy stated by the Disk Manager Tool
11. Etcher app, 2019-07-10-raspbian-buster-lite.img inserted, Flashing started
12. Sd card unmounted
13. SD card inserted to PI4
14. Power on
15. PWR led flashing for 5 min (waiting for something else activity but no hope)
16. SoC was not cold
17. Turned off

Things I have done for getting bootable sd card (Way 2):
I’m on Windows platform
1. Inserted the sd card with the SD Adapter to laptop
2. Format the Samsung 8GB microSD Card using official SD card formatter, recommended on the official raspberry site
3. Checked in Disk Management GUI the sd card:
a. has Primary Partition
b. is healthy stated by the Disk Manager Tool
4. Etcher app, 2019-07-10-raspbian-buster-lite.img inserted, Flashing started
5. Sd card unmounted
6. SD card inserted to PI4
7. Power on
8. PWR led flashing for 5 min (waiting for something else activity but no hope)
9. SoC was not cold
10. Turned off

maxicorn
Posts: 5
Joined: Tue Aug 27, 2019 7:05 am

Re: PI 4 PWR Led Flashing no boot, STICKY: Is your Pi not booting? Read throughugh

Fri Aug 30, 2019 10:22 am

maxicorn wrote:
Fri Aug 30, 2019 10:17 am
My plan is to set up headless raspberry, via ssh or wireless using my LAN
I have the following HW:
From official distributor:
Rasberry PI 4 2GB
Official PI 4 Charger
Already have:
Ethernet cable
Samsung microSD card 8GB Class 10
Kingston microSD card 16GB Class 4
Kingston MicroSD Adapter

Status:
PI 4 PWR Led flashing, no ACT lad activity.

https://www.raspberrypi.org/forums/view ... p?p=437084 Read this post through 4 times

EEPROM content is corrupted?
- Just charger plugged in, no ACT led activity, PWR led flashing
Not blinking four times with nothing but the power connected (and no SD-card) implies that the bootloader is not working correctly and should be reinstalled using recovery.bin. see https://www.raspberrypi.org/documentati ... teeprom.md

- This sentence does not give any explicit information about the status of PWR led!


Never mind, let’s try to recover the bootloader!

I’m on Windows platform
1. Inserted the sd card with the SD Adapter to the laptop
2. Format the the Kingston 8GB microSD Card with Windows Formatter
a. File System FAT32
b. Allocation Unit size 4096bytes
c. Volume label: noob
d. Full format
3. Format the the Kingston 16B microSD Card with Official SD card formatter that is recommended on the official site
a. Overwrite format
b. CHS format size adjustment on
4. copy of recovery.bin in the first partition of an SD card, formatted to FAT32. (statement copied from the official site) to both 16GB and 8GB sdCards
5. It flashes the green LED rapidly (forever) upon success. No green led flashing in 5 min for both sdCard
6. SoC was not cold both time
7. PWR red led flashing in 5 min until charger off

-------------------------------------------------------------------------------------------
Read from sticky post

If you have one of the later PI PI's (2 or 3) which won't boot and it keeps stuck on the rainbow screen, while also displaying the under voltage (lightening bolt) icon, and/or the red LED flashing then you are simply using boot code that is too old.

Question: Is this statement valid for PI 4 too?


Still the under voltage icon in the rainbow screen -only- indicates you are using the wrong boot code, it probably doesn't at that point indicate a power fail. Due to the RPI3B+ new power chip, (which includes the under voltage detector) old software no longer will find under voltage info in the same I/O registers, as its now reads that info through I2C. This also means that the red power LED is now also under CPU control, so it can flash (even without a real power fail)

Question: Is this mean that RPI4 chip has the same feature, so that maybe there is problem with the boot code?

Tried simply to go for booting up raspbian-buster-lite

Downloaded the latest
Raspbian Buster Lite from https://www.raspberrypi.org/downloads/raspbian/
SHA-256: 9e5cf24ce483bb96e7736ea75ca422e3560e7b455eee63dd28f66fa1825db70e

Things I have done for getting bootable sd card (Way 1):
I’m on Windows platform
8. Inserted the sd card with the SD Adapter
9. Format the Samsung 8GB microSD Card with Windows Official formatter
a. File System FAT32
b. Allocation Unit size 4096bytes
c. Volume label: noob
d. Full format
10. Checked in Disk Management GUI the sd card:
a. has Primary Partition
b. is healthy stated by the Disk Manager Tool
11. Etcher app, 2019-07-10-raspbian-buster-lite.img inserted, Flashing started
12. Sd card unmounted
13. SD card inserted to PI4
14. Power on
15. PWR led flashing for 5 min (waiting for something else activity but no hope)
16. SoC was not cold
17. Turned off

Things I have done for getting bootable sd card (Way 2):
I’m on Windows platform
1. Inserted the sd card with the SD Adapter to laptop
2. Format the Samsung 8GB microSD Card using official SD card formatter, recommended on the official raspberry site
3. Checked in Disk Management GUI the sd card:
a. has Primary Partition
b. is healthy stated by the Disk Manager Tool
4. Etcher app, 2019-07-10-raspbian-buster-lite.img inserted, Flashing started
5. Sd card unmounted
6. SD card inserted to PI4
7. Power on
8. PWR led flashing for 5 min (waiting for something else activity but no hope)
9. SoC was not cold
10. Turned off
I've downloaded an app for my phone that can check the charger voltage, so I tried my PI 4 charger with my phone and the result is 4.126V.

fruitoftheloom
Posts: 20680
Joined: Tue Mar 25, 2014 12:40 pm
Location: Delightful Dorset

Re: PI 4 PWR Led Flashing no boot, STICKY: Is your Pi not booting? Read throughugh

Fri Aug 30, 2019 10:26 am

maxicorn wrote:
Fri Aug 30, 2019 10:22 am
maxicorn wrote:
Fri Aug 30, 2019 10:17 am
My plan is to set up headless raspberry, via ssh or wireless using my LAN
I have the following HW:
From official distributor:
Rasberry PI 4 2GB
Official PI 4 Charger
Already have:
Ethernet cable
Samsung microSD card 8GB Class 10
Kingston microSD card 16GB Class 4
Kingston MicroSD Adapter

Status:
PI 4 PWR Led flashing, no ACT lad activity.

https://www.raspberrypi.org/forums/view ... p?p=437084 Read this post through 4 times

EEPROM content is corrupted?
- Just charger plugged in, no ACT led activity, PWR led flashing
Not blinking four times with nothing but the power connected (and no SD-card) implies that the bootloader is not working correctly and should be reinstalled using recovery.bin. see https://www.raspberrypi.org/documentati ... teeprom.md

- This sentence does not give any explicit information about the status of PWR led!


Never mind, let’s try to recover the bootloader!

I’m on Windows platform
1. Inserted the sd card with the SD Adapter to the laptop
2. Format the the Kingston 8GB microSD Card with Windows Formatter
a. File System FAT32
b. Allocation Unit size 4096bytes
c. Volume label: noob
d. Full format
3. Format the the Kingston 16B microSD Card with Official SD card formatter that is recommended on the official site
a. Overwrite format
b. CHS format size adjustment on
4. copy of recovery.bin in the first partition of an SD card, formatted to FAT32. (statement copied from the official site) to both 16GB and 8GB sdCards
5. It flashes the green LED rapidly (forever) upon success. No green led flashing in 5 min for both sdCard
6. SoC was not cold both time
7. PWR red led flashing in 5 min until charger off

-------------------------------------------------------------------------------------------
Read from sticky post

If you have one of the later PI PI's (2 or 3) which won't boot and it keeps stuck on the rainbow screen, while also displaying the under voltage (lightening bolt) icon, and/or the red LED flashing then you are simply using boot code that is too old.

Question: Is this statement valid for PI 4 too?


Still the under voltage icon in the rainbow screen -only- indicates you are using the wrong boot code, it probably doesn't at that point indicate a power fail. Due to the RPI3B+ new power chip, (which includes the under voltage detector) old software no longer will find under voltage info in the same I/O registers, as its now reads that info through I2C. This also means that the red power LED is now also under CPU control, so it can flash (even without a real power fail)

Question: Is this mean that RPI4 chip has the same feature, so that maybe there is problem with the boot code?

Tried simply to go for booting up raspbian-buster-lite

Downloaded the latest
Raspbian Buster Lite from https://www.raspberrypi.org/downloads/raspbian/
SHA-256: 9e5cf24ce483bb96e7736ea75ca422e3560e7b455eee63dd28f66fa1825db70e

Things I have done for getting bootable sd card (Way 1):
I’m on Windows platform
8. Inserted the sd card with the SD Adapter
9. Format the Samsung 8GB microSD Card with Windows Official formatter
a. File System FAT32
b. Allocation Unit size 4096bytes
c. Volume label: noob
d. Full format
10. Checked in Disk Management GUI the sd card:
a. has Primary Partition
b. is healthy stated by the Disk Manager Tool
11. Etcher app, 2019-07-10-raspbian-buster-lite.img inserted, Flashing started
12. Sd card unmounted
13. SD card inserted to PI4
14. Power on
15. PWR led flashing for 5 min (waiting for something else activity but no hope)
16. SoC was not cold
17. Turned off

Things I have done for getting bootable sd card (Way 2):
I’m on Windows platform
1. Inserted the sd card with the SD Adapter to laptop
2. Format the Samsung 8GB microSD Card using official SD card formatter, recommended on the official raspberry site
3. Checked in Disk Management GUI the sd card:
a. has Primary Partition
b. is healthy stated by the Disk Manager Tool
4. Etcher app, 2019-07-10-raspbian-buster-lite.img inserted, Flashing started
5. Sd card unmounted
6. SD card inserted to PI4
7. Power on
8. PWR led flashing for 5 min (waiting for something else activity but no hope)
9. SoC was not cold
10. Turned off
I've downloaded an app for my phone that can check the charger voltage, so I tried my PI 4 charger with my phone and the result is 4.126V.

You need a Power Supply and not a Charger, the Raspberry Pi has no battery to charge:

https://www.raspberrypi.org/products/ty ... er-supply/



Regards Etcher it will take the .zip download and create a Bootable SD Card, there is no need to pre-format the SD Card etal....
Last edited by fruitoftheloom on Fri Aug 30, 2019 10:31 am, edited 1 time in total.
Retired disgracefully.....

User avatar
B.Goode
Posts: 8481
Joined: Mon Sep 01, 2014 4:03 pm
Location: UK

Re: PI 4 PWR Led Flashing no boot, STICKY: Is your Pi not booting? Read throughugh

Fri Aug 30, 2019 10:28 am

the Raspberry Pi has NO battery to charge

maxicorn
Posts: 5
Joined: Tue Aug 27, 2019 7:05 am

Re: PI 4 PWR Led Flashing no boot, STICKY: Is your Pi not booting? Read throughugh

Fri Aug 30, 2019 10:40 am

You need a Power Supply and not a Charger, the Raspberry Pi has no battery to charge:

https://www.raspberrypi.org/products/ty ... er-supply/



Regards Etcher it will take the .zip download and create a Bootable SD Card, there is no need to pre-format the SD Card etal....
[/quote]

Sory, I was not so explicit about the charger. I have exact same power supply.

Thanks for questioning my post, but please be kind and and reply to my questions too stated in the init post :)

Tried with only Etcher and Raspbian Buster Lite but the same issue, PWR red led flashing till I unplug the power supply

maxicorn
Posts: 5
Joined: Tue Aug 27, 2019 7:05 am

Re: PI 4 PWR Led Flashing no boot, STICKY: Is your Pi not booting? Read throughugh

Fri Aug 30, 2019 10:43 am

B.Goode wrote:
Fri Aug 30, 2019 10:28 am
the Raspberry Pi has NO battery to charge
Thanks for questioning my post,

I have a power supply purchased from official vendor for PI4

User avatar
Burngate
Posts: 6002
Joined: Thu Sep 29, 2011 4:34 pm
Location: Berkshire UK Tralfamadore
Contact: Website

Re: PI 4 PWR Led Flashing no boot, STICKY: Is your Pi not booting? Read throughugh

Fri Aug 30, 2019 10:53 am

With nothing but the power supply connected, and no SD card, the green LED should blink four times then repeat.
The red LED SHOULD NOT BLINK

If it does, then you have a faulty power supply or faulty Pi.

maxicorn
Posts: 5
Joined: Tue Aug 27, 2019 7:05 am

Re: PI 4 PWR Led Flashing no boot, STICKY: Is your Pi not booting? Read throughugh

Fri Aug 30, 2019 10:56 am

Burngate wrote:
Fri Aug 30, 2019 10:53 am
With nothing but the power supply connected, and no SD card, the green LED should blink four times then repeat.
The red LED SHOULD NOT BLINK

If it does, then you have a faulty power supply or faulty Pi.
Thank you for the clear reply!

timg236
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 192
Joined: Thu Jun 21, 2018 4:30 pm

Re: PI 4 PWR Led Flashing no boot, STICKY: Is your Pi not booting? Read throughugh

Fri Aug 30, 2019 11:16 am

Very odd. Any chance of a photo (both sides of the board) or short video clip ?

When you see PWR LED flashing, is this a regular pattern or is it an irregular flicker ?

fruitoftheloom
Posts: 20680
Joined: Tue Mar 25, 2014 12:40 pm
Location: Delightful Dorset

Re: PI 4 PWR Led Flashing no boot, STICKY: Is your Pi not booting? Read throughugh

Fri Aug 30, 2019 11:32 am

maxicorn wrote:
Fri Aug 30, 2019 10:40 am
You need a Power Supply and not a Charger, the Raspberry Pi has no battery to charge:

https://www.raspberrypi.org/products/ty ... er-supply/




Regards Etcher it will take the .zip download and create a Bootable SD Card, there is no need to pre-format the SD Card etal....
Sory, I was not so explicit about the charger. I have exact same power supply.

Thanks for questioning my post, but please be kind and and reply to my questions too stated in the init post :)

Tried with only Etcher and Raspbian Buster Lite but the same issue, PWR red led flashing till I unplug the power supply

Please be aware everyone here is a volunteer with differing levels of skills set.

So I have fallen short, good luck......
Retired disgracefully.....

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