The raspberry Pi 3 B doesn´t send image to the HDMI

[PaulitaPerezB]

I prepare the Raspberry exactly how the starter guide says, but when I power it nothing appeard on the TV (the both leds are on, the green one and the red one). I have been looking everywhere and the most trustful solution seems to be changing the config.txt file. I tried to do this directly from the SD card but the file never save my changes. I don´t know what to do next.
I´m trying with two computers, one have windows 7 and the another Windows 10.
Please someone help me.
I have a raspberry Pi 3 B

[fruitoftheloom]

I prepare the Raspberry exactly how the starter guide says, but when I power it nothing appeard on the TV (the both leds are on, the green one and the red one). I have been looking everywhere and the most trustful solution seems to be changing the config.txt file. I tried to do this directly from the SD card but the file never save my changes. I don´t know what to do next.
I´m trying with two computers, one have windows 7 and the another Windows 10.
Please someone help me.
I have a raspberry Pi 3 B

Please work your way through the Stickies, it has had 5+ years of pitfalls encountered:

viewtopic.php?f=28&t=58151

etcetera

[PaulitaPerezB]

Thank you, but I couldn´t fix the problem. I´m having trouble adding configurations to the config.txt file. I don´t know why but my changes are not saved and I cannot add any extra file to the boot one.

[k-pi]

I would think you did something wrong when you tried to put the image onto your card.
Re download the raspbian image, check that you got a good download, then image your card with it.
It should just boot up & connect via the HDMI to your TV/monitor.

[fruitoftheloom]

Thank you, but I couldn´t fix the problem. I´m having trouble adding configurations to the config.txt file. I don´t know why but my changes are not saved and I cannot add any extra file to the boot one.

Etcher both unzips the download and creates a bootable SD Card, use the Etcher instructions here:

https://www.raspberrypi.org/documentati ... /README.md


The USB Card Reader needs to be SDHC complient.

[drgeoff]

@fotl
No card reader is "SDHC complient".

(You've made that error more than once so not a typo!)

[Burngate]

With all this talk about Etcher and SD cards, noone has asked if PaulitaPerezB is using NOOBs or not.
Aren't there two config.txt files in NOOBs?

[FTrevorGowen]

With all this talk about Etcher and SD cards, noone has asked if PaulitaPerezB is using NOOBs or not.
Aren't there two config.txt files in NOOBs?

IIRC, there can be more than two ie. one for the NOOBS installer itself, plus one for each of the O.S.'s installed (in a different partition, associated with a given O.S.). Normally those for the O.S.'s would have been accessed via NOOBS' built-in config.txt editor - but, to some extent, that presumed that, via appropriate keypress or by (externally) editing (creating) NOOBS' own config.txt, a usable, if not optimum, display could be obtained.
Trev.

[PaulitaPerezB]

thanks everyone, I could fix the problem by reinstalling NOOBs in the SD card. Then I change the config.txt manually from the Raspberry Pi.
if someone is having the same trouble I'll give you some useful information.
When you start NOOBs for the first time the Raspberry only send video to the hdmi port. So if your problem is that the monitor is not being detected, you can try reinstalling NOOBs. Then try to modify the config.txt file from the prompt manually to help the raspberry to detect your monitor forever..
In the next link you can find the commands I used to do that.
https://elinux.org/R-Pi_configuration_file

[k-pi]

Glad you got it sorted out..
Thanks for the link, (& sorry, I thought you were having trouble with Raspian, not NOOBS).