RPI hdmi is not working

[blackminion]

Hi
I have a RPI2 B & i bought this HDMI to VGA adapter
http://detail.1688.com/offer/4201035057 ... 0.0.eKnIt8
My adapter is working good with my PC & monitor (Samsung NW1733)
but when i connect adapter to RPI
monitor does not display anything & screen is black
now how can i fix the problem ?
please help to resolve this problem .
Thanks in advance

[hamza]

Plz send your configrations.../boot/config.txt

make sure hdmi-hotpluge=1

[blackminion]

hello hamza
I can not install os because i have not any display
so the config.txt is default

[drgeoff]

Do you know if your RPi is booting?

Read the sticky "NOT BOOTING".

[blackminion]

no
i am sure rpi booting
because act led is blink
& 2 day's ago i installed raspbian with another adapter
but yesterday i format SD cart with O&O PartitionManager
& wrote noobs to sd cart

[blackminion]

No one came to help me?

[FTrevorGowen]

...
but yesterday i format SD cart with O&O PartitionManager
& wrote noobs to sd cart
...

Whatever "O&O PartitionManager" is (can you post further details, a link perhaps), it may not format the SDHC correctly for NOOBS use. The recommended formatting tools** are either the SDA's tool (Windows & Mac) or GParted (or similar) on Linux.
(I usually use GParted on my netbook when booted into Ubuntu Linux, and occasionally, for test purposes, the SDA Formatter under Windows XP or 7.****) It's also possible to format a card correctly in a Digital Camera.
Trev.
** https://www.raspberrypi.org/help/noobs-setup/
**** http://www.cpmspectrepi.webspace.virgin ... 14P2B.html
http://www.cpmspectrepi.webspace.virgin ... lV132.html

[blackminion]

i used this => http://www.oo-software.com/en/support/p ... windows-pe
on win7
but I am going to test SD Formatter 4.0
& I will be back

[blackminion]

Hello
i used sd formatter but the problem is not resolved

[FTrevorGowen]

Hello
i used sd formatter but the problem is not resolved

O.K. Did you check the formatting settings and copy the NOOBS files over in the same way as I did here (ie. my previously linked to web page**):
http://www.cpmspectrepi.webspace.virgin ... 14P2B.html
Trev.
** I've yet to post updated (ie. NOOBS 1.4) monitor photographs, but those shown in the other link (for an older version of NOOBS) are much the same as you should see anyway.

[blackminion]

yep
i checked format setting & copy noobs

[mahjongg]

no
i am sure rpi booting
because act led is blank

what do you mean by this "blank"? it doesn't seem to suggest the PI is booting, or do you mean "blink"?
did you really read and understand the boot problem sticky?
Because in 99.9% of cases, its just something you do wrong (making the wrong assumptions, using the wrong stuff, doing things wrong) that causes it not to work.

[mahjongg]

P.s. you can forego NOOBS, and directly install an image using older method of directly writing Raspbian to the card, that way you have more direct control over config.txt, and can access config.txt from a window PC, as it will be in the root directory of the card, so you can edit it with notepad++
info on how to directly write an image is here:https://www.raspberrypi.org/documentati ... windows.md
if the adapter does not signal it is a HDMI device, you have to force HDMI detection, if the adapter does not forward CEC data from the monitor then you have to set a compatible resolution in config.txt.
info about config.txt is here:
https://www.raspberrypi.org/documentati ... fig-txt.md

also, if you boot NOOBS you might switch between optimal and save HDMI modes, by pressing 1 or 2 directly after NOOBS has booted. this will also switch on HDMI even if the adapter doesn't signal its a HDMI device, and also it doesn't need to get CEC data.

watch the ACT LED and when it stops blinking press 1 then 2 then 1 until you see a picture.
hold shift if you think that NOOBS has already installed an OS to return to NOOBS.

[blackminion]

what do you mean by this "blank"? it doesn't seem to suggest the PI is booting, or do you mean "blink"?
did you really read and understand the boot problem sticky?
Because in 99.9% of cases, its just something you do wrong (making the wrong assumptions, using the wrong stuff, doing things wrong) that causes it not to work.

Yes I mean is blinking
So I've edited the post

[blackminion]

watch the ACT LED and when it stops blinking press 1 then 2 then 1 until you see a picture.
hold shift if you think that NOOBS has already installed an OS to return to NOOBS.

mahjongg thank you to replay
I watched the ACT LED and when it stop blinking typed 1 2 1
then i see a little colored square to the up & right of monitor
you can see that here (low quality photo )
now what should I do ???

[BMS Doug]

watch the ACT LED and when it stops blinking press 1 then 2 then 1 until you see a picture.
hold shift if you think that NOOBS has already installed an OS to return to NOOBS.

mahjongg thank you to replay
I watched the ACT LED and when it stop blinking typed 1 2 1
then i see a little colored square to the up & right of monitor
you can see that here (low quality photo )
now what should I do ???

get an externally powered HDMI to VGA converter instead.

[fruitoftheloom]

watch the ACT LED and when it stops blinking press 1 then 2 then 1 until you see a picture.
hold shift if you think that NOOBS has already installed an OS to return to NOOBS.

mahjongg thank you to replay
I watched the ACT LED and when it stop blinking typed 1 2 1
then i see a little colored square to the up & right of monitor
you can see that here (low quality photo )
now what should I do ???

Presume you are using a good quality 5V 2A Power Supply for the RPi

[blackminion]

my hdmi to vga have an usb foot print
i can solder a micro usb socket for externally power
but the internally power connected to HDMI pin number 18 & 19
pin number 18 is +5V but pin number 19 for what is it?

[blackminion]

hello everybody
today i installed rasbian
when ACT led stopped i press 121 then 131
after a few moments i saw setup window
when fully installed, restart the raspberry pi
and returned to the previous mode again
now what should I change in config file to fix the problem

[mahjongg]

When you get a visible output, there should be a screen asking if you want to keep that setting. If you do the setting will be written to config.txt, and be used by the OS you install (and also by NOOBS when you hold shift during boot to return to NOOBS).
Its also possible to edit config.txt from within NOOBS if you want to force a setting more compatible with your monitor.

[blackminion]

When you get a visible output, there should be a screen asking if you want to keep that setting. If you do the setting will be written to config.txt, and be used by the OS you install (and also by NOOBS when you hold shift during boot to return to NOOBS).
Its also possible to edit config.txt from within NOOBS if you want to force a setting more compatible with your monitor.

hi
I could edit config.txt and uncomment these lines
config_hdmi_boost=4
hdmi_drive=2
hdmi_mode=47
hdmi_group=2
hdmi_force_hotplug=1
overscan_left=16
overscan_right=16
overscan_top=16
overscan_bottom=16
disable_overscan=1
now my monitor can show desktop but every things is so big
I edited resolution with this line
hdmi_mode=47
to 1440*900 but nothing changed

[DougieLawson]

Now that you've got the display running take a look at what modes it can run.

tvservice -m CEA && tvservice -m DMT

mode 16 is normally going to work on most TVs and HDMI monitors.

[blackminion]

Finally I managed to do settings
Thank you all to guided me particularly M.r mahjongg