HDMI monitors says NO SIGNAL [SOLVED]

[gubach22]

Hello, I connected the RPi for the first time to a TV monitor with HDMI but I got "No Signal". I tried it on several chanels and cables with no luck. Other computers work fine with the TV and the cables so there can not be the problem. Then I tried a computer monitor with HDMI also with no monitor image (I have not tested the video output of the RPi because no cables are available at the moment). What is happening?

[Tirpitz]

I presume, you have installed your selected OS on SD card. Boot sector of the SD card is normally accessible from Windows, so you can edit file config.txt. What you maybe need?
Add into config.txt this line:

Code: Select all

hdmi_force_hotplug=1

I experienced similar problem on one older LCD TV and this procedure helped.

[mahjongg]

do note that without a correctly booting sd-card no video will be put out at all!

[gubach22]

The hint to the SD Card was right. I have made a new one and the TV can be used now. Thanks!

[decates]

Just to confirm, this worked for me too. Oddly, my old HDMI TV worked fine without, but a brand new BenQ monitor required this fix.

[sshipway]

I've investigated a problem similar to this one for a couple of weeks now.

The Pi outputs a relatively weak HDMI signal. Some devices may not immediately notice the Pi's HDMI or may not do the negotiation.
Setting the hdmi_force_hotplug=1 makes sure the Pi believes the monitor/TV is really there.
You might also need to set config_hdmi_boost=4 or even higher (up to 9) if your display needs a stronger signal.
If the display is a computer monitor, use hdmi_group=1 and if it is an older TV, try hdmi_group=2.
Do not set hdmi_safe=1 as that overrides many of the previous options.
Using a shorter or better quality HDMI cable might help.
Make sure your Pi's power supply delivers 1A and not 500mA.
If you see a problem with the red colour - either absent, or interference - then try a boost. However it might simply be that the display requires a stronger signal than the Pi can give.

[pjc123]

I've investigated a problem similar to this one for a couple of weeks now.

The Pi outputs a relatively weak HDMI signal. Some devices may not immediately notice the Pi's HDMI or may not do the negotiation.
Setting the hdmi_force_hotplug=1 makes sure the Pi believes the monitor/TV is really there.
You might also need to set config_hdmi_boost=4 or even higher (up to 9) if your display needs a stronger signal.
If the display is a computer monitor, use hdmi_group=1 and if it is an older TV, try hdmi_group=2.
Do not set hdmi_safe=1 as that overrides many of the previous options.
Using a shorter or better quality HDMI cable might help.
Make sure your Pi's power supply delivers 1A and not 500mA.
If you see a problem with the red colour - either absent, or interference - then try a boost. However it might simply be that the display requires a stronger signal than the Pi can give.

Or you could have just read the R-Pi Troubleshooting Guide like I did when fixing the same HDMI problem in just a couple of minutes:

http://elinux.org/R-Pi_Troubleshooting

[AndyGadget]

Tirpitz fixed it for me - all I needed to do was add the extra line to the config file and I could see it boot up
Many thanks

[fradaxx]

This solved my problem with my ASUS HDMI monitor!
Thanks from an absolute newbie with Raspberry Pi!

[mike.g3]

I just bought the Model B today and had this problem. I'm using a ViewSonic monitor with an HDMI connection. I did not have to change any of the configuration files. All I did was remove the SD card and reboot and the monitor acquired the signal.

[bugfarm]

Thanks! This resolved the "no video" problem for me and was such an easy fix. Much appreciated.

[3BX]

Thanks for the tip. This worked for me, as stated above.
Uncomment in config.txt
hdmi_force_hotplug=1

[rahult]

i refered:
http://elinux.org/R-Pi_Troubleshooting# ... on_display
there is a point:
Check that you have correctly written a Raspberry Pi image to the card by using a MAC or PC and browse for the following files:
bootcode.bin
fixup.dat
start.elf amongst others

i could not find fixup.dat and start.elf files in my image.

plus there isnt any config.txt file too..

[rosignol]

I have a similar problem my Pi (older version) stopped displaying videos
the SD card works ok with a different Pi (same model) I have 4 cards (1is xbmc) none are able to display, eg "no signal"
on the problem Pi but all work on the other one.
at the time of failing I was testing a looped video on xbmc

any ideas?

[DougieLawson]

i refered:
http://elinux.org/R-Pi_Troubleshooting# ... on_display
there is a point:
Check that you have correctly written a Raspberry Pi image to the card by using a MAC or PC and browse for the following files:
bootcode.bin
fixup.dat
start.elf amongst others

i could not find fixup.dat and start.elf files in my image.

plus there isnt any config.txt file too..

That wiki page is a load of old junk, because NOOBS hides those things in a different partition.

Take a look a partition #1 and #5 on your SDCard.

[Jeferson]

I have tried all the solutions listed here still I'm not getting any display.

[mahjongg]

read the boot problem sticky!
viewtopic.php?f=28&t=58151

[Robertsthlm]

Hi,
So after my initial purchase of the Raspberry Pi Model B (The biggest model, quad core and 1gb ram)

I just cannot make it output anything on HDMI, the microsd card has been swapped and tested on a kncminer that runs a similar raspberry pi, if not in fact identical...

The Raspberry pi, Powers up, The green ACT led flashes for 20-30 seconds Before it "quiets down", No signal from my monitor, No signal if connected to the TV (The KNCMiner does output to that TV so there should be no incompatibility issues) The powerbrick has been changed between different ones, Modified D-Link powerbricks 5V 2A, the latest one i found was a huge thing, 5V 3A, but the result is the same.... the board seems to boot normally, but no video. i even purchased a 3.5" touchscreen from Ebay just to make sure there were no issues with the HDMI itself, the screen is just all White and nothing else.

So tried 2 different Monitors (PC-Monitor and TV)
Tried atleast 5 different Power supplies
Hooked up a custom mini-display that is made just for the Raspberry pi.
No Rainbow-screen. nothing zip nada.
Board seems to boot just nice. No Video..

Tried The Elec-xbmc, the Another xbmc, Some Linux versions........ just about Everything...

Do i need more than one powersource to make this thing output video ?

Or is this really about me trying to boot from an incompatible distribution.. I have really tried most things now except to try to boot from older images and such..

Suggestions people... Anything would be much appriciated.

/Robert

[FTrevorGowen]

Hi,
So after my initial purchase of the Raspberry Pi Model B (The biggest model, quad core and 1gb ram)
I just cannot make it output anything on HDMI, the microsd card has been swapped and tested on a kncminer that runs a similar raspberry pi, if not in fact identical...

Exactly what model of Pi does the "kncminer" (whatever that is?) use - a P2B is not the same as the, albeit similar, B+ and needs an O.S. with upgraded firmware!

The Raspberry pi, Powers up, The green ACT led flashes for 20-30 seconds Before it "quiets down", No signal from my monitor, No signal if connected to the TV (The KNCMiner does output to that TV so there should be no incompatibility issues) The powerbrick has been changed between different ones, Modified D-Link powerbricks 5V 2A, the latest one i found was a huge thing, 5V 3A, but the result is the same.... the board seems to boot normally, but no video. i even purchased a 3.5" touchscreen from Ebay just to make sure there were no issues with the HDMI itself, the screen is just all White and nothing else.

The green ACTivity led behaviour is similar to that for a NOOBS image when connected to a display that isn't compatible with NOOBS' default HDMI setting. If you were/are using NOOBS did you try "hdmi safe mode" by holding/toggling key '2' during boot. (NB. an older NOOBS setup that was originally created for a B+ again will not work on a P2B - you need a current version)

So tried 2 different Monitors (PC-Monitor and TV)
Tried atleast 5 different Power supplies
Hooked up a custom mini-display that is made just for the Raspberry pi.
No Rainbow-screen. nothing zip nada.
Board seems to boot just nice. No Video..
Tried The Elec-xbmc, the Another xbmc, Some Linux versions........ just about Everything...
Do i need more than one powersource to make this thing output video ?
Or is this really about me trying to boot from an incompatible distribution.. I have really tried most things now except to try to boot from older images and such..
Suggestions people... Anything would be much appriciated.
/Robert

Have you actually tried one of the images from the RPi downloads page? (They all should work with a P2B, images from elsewhere may not have been updated by their maintainers)
Also (re-)read through view ... 28&t=58151
Trev.

[nitewing76]

I could see the pi on my TV, but the screen still said "no signal".

For me, the only option that worked was to start over and ensure I ran Rufus 2.8 as Administrator.

[JJPJZ]

I am new to Raspberry Pi and I just had the same problem. I ended up using NOOBS Lite and it is working great with me. I was getting 4 flashes in the ACT LED and it lead me to believe that the regular downloaded NOOBS was corrupt. After so many attempts to fix the problem, I threw the kitchen sink by trying the Lite version and it worked!

[boberthemage]

I am having a similar problem with my RPi 3 model B. It USED to work, but now i have a No Signal screen! I am using a HANNS-G computer monitor with a HDMI-DVI adaptor. My SD has NOOBS. I used these same devices when my RPi worked. I bought another SD, put NOOBS on it, but now I am having this problem.
I tried everything above (except Noobs Lite) and there is no "Config" file, probably because I am using NOOBS. And by the way, I don't want to have to purchase anything else.

[Pi Chi]

I presume, you have installed your selected OS on SD card. Boot sector of the SD card is normally accessible from Windows, so you can edit file config.txt. What you maybe need?
Add into config.txt this line:

Code: Select all

hdmi_force_hotplug=1

I experienced similar problem on one older LCD TV and this procedure helped.

No kidding, adding the hdmi_force_hotplug=1 line solved my issue. thanks for the pro tip. was hopelessly stuck with my benq with no clue of what i'm doing wrong despite double checking it.

[EZH74]

Hi,
I confirm that modifying config.txt

Code: Select all

hdmi_force_hotplug=1

solve the problem for me.

LCD Screen BELINEA :
first boot (new image on SD) well detected, displaying full resolution perfectly
if i reboot, continue to works well (many reboot ok)
if shutdown (in cmd line or via menu) at restart no screen... (reflash the image and so on 3 times)

so modifiying config.txt on the same SD card used (i did it under win 10 under my laptop) after the 1st boot on pi
that solve the problem

Thks

[gisbert]

I used the official pi zero case and the original hdmi to hdmi-mini adapter and this caused me a 'no signal' error.

removing the pi zero from its casing solved it.