Not Booting

[yingyong25]

I Haven't touched the raspberry pi in ages and I think my memory card went wired, so I went to flash Raspbian on it.
I put the card in the Raspberry pi and surprise! It had the red light but no green light. I am not sure if it can read the micro sd card or not

[rpdom]

There's a Boot Problems "sticky" post at the top of this troubleshooting forum. That should help you diagnose what is wrong.

For a start the steady Red LED means the Pi is receiving sufficient power.

Lack of activity on the Green LED means it hasn't managed to read anything from the SD card.

It could be a problem with the card. It could be a problem with the Pi hardware. There are suggestions in that post on what to look for. Read it all, despite it being long and not all of it applying.

[gkaiseril]

A couple of things I have found helpful in installing software .

1.Printout the instructions.
2. Read and reread the instructions.
3. Make a check list of actions to take.
4. Install following your check list.
5. As each step is taken check off the step and check for any errors.
6. It is best to be rested and relaxed when installing software.
7. Take a break if you are frustrated.

[yingyong25]

I tried reading the voltage with a multimeter. It gave me 2 volts which I dont think is right as the power its supposed to take is 5v, any idea how to fix this
update this is incorrect

[fruitoftheloom]

I tried reading the voltage with a multimeter. It gave me 2 volts which I dont think is right as the power its supposed to take is 5v, any idea how to fix this

What are you using for a Power Supply ??


The official PSU is 5.1V 2.5A:

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

[yingyong25]

26.37 volts is what I got when measuring the first gpio pin if you look at the raspberry pi with the HDMI towards you on the left bottom grounded with the ethernet port. 52.33 volts is what I got from measuring the first gpio pin on the left top grounded with the ethernet port. 52.70 is what i got from one of the soldering bits near the micro usb port grounded with the micro sd card holder with no sd card in.

I dont know if these voltages are correct or incorrect? please help me out here

[yingyong25]

I tried reading the voltage with a multimeter. It gave me 2 volts which I dont think is right as the power its supposed to take is 5v, any idea how to fix this

What are you using for a Power Supply ??


The official PSU is 5.1V 2.5A:

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

the power supply im using is a oppo phone quick charge cable with a huwawei adaptor. sounds a little risky but i still get power.

[Burngate]

... 26.37 volts ... 52.33 volts ... 52.70 ...

I dont know if these voltages are correct or incorrect? please help me out here

These are not correct!

If the red led is on, then it's receiving the correct voltage, despite using an iffy supply.

Make sure you are using your multimeter correctly - check that an ordinary alkaline AA cell reads about 1.5v.
If it doesn't, it's perhaps set to AC, or perhaps current, or just the wrong range.

If that works ok, make sure you've identified the correct pins on the GPIO header - https://pinout.xyz/# is useful (with the USB and ethernet connectors at the bottom)

[yingyong25]

... 26.37 volts ... 52.33 volts ... 52.70 ...

I dont know if these voltages are correct or incorrect? please help me out here

These are not correct!

If the red led is on, then it's receiving the correct voltage, despite using an iffy supply.

Make sure you are using your multimeter correctly - check that an ordinary alkaline AA cell reads about 1.5v.
If it doesn't, it's perhaps set to AC, or perhaps current, or just the wrong range.

If that works ok, make sure you've identified the correct pins on the GPIO header - https://pinout.xyz/# is useful (with the USB and ethernet connectors at the bottom)

3.706- first 3v3 gpio pin
5.333- second 3v3 gpio pin

[mahjongg]

... 26.37 volts ... 52.33 volts ... 52.70 ...

I dont know if these voltages are correct or incorrect? please help me out here

These are not correct!

If the red led is on, then it's receiving the correct voltage, despite using an iffy supply.

Make sure you are using your multimeter correctly - check that an ordinary alkaline AA cell reads about 1.5v.
If it doesn't, it's perhaps set to AC, or perhaps current, or just the wrong range.

If that works ok, make sure you've identified the correct pins on the GPIO header - https://pinout.xyz/# is useful (with the USB and ethernet connectors at the bottom)

3.706- first 3v3 gpio pin
5.333- second 3v3 gpio pin

Check the battery in your meter, as these voltages are nonsensically out of range, especially the 3V3 one.

Measure the voltage with an easy to touch (with the black probe of your meter) GND point, good ground (GND) points are the metal shells of either HDMI, USB or Ethernet connectors.

Be careful not to short two GPIO header pins with your probe.

The suggestion that there is ANY voltage on the 3v3 pin at all suggest that the 3V3 regulator is NOT dead.

[yingyong25]

You know what ? Should i just get the new raspberry pi?