HDMI worked in another display, stopped working now on a LG!

Question

My Raspberry Pi Model B Board works with RCA output, but do not work with HDMI, after it shows the splash screen. (curiously enough, it shows the splash screen, then a white screen with an option to press SHIFT - after that the TV shows "NO SIGNAL").

It is strange because the HDMI output worked before with another LCD TV which I don't have anymore. Now, with an LG TV the HDMI is not working, even when I change the config.txt, as suggested by other peopl people.

I tried uncommenting:

hdmi_force_hotplug=1
hdmi_drive=2
config_hdmi_boost=4

But it didn't work! It worked when I uncommented:

hdmi_safe=1

However the resolution looked awful. I changed the HDMI cable, I inverted the cables, I switch on the Raspberry after the TV was on and the right input (HDMI) was selected.

Could this be a resolution problem?

Answer 1

In your terminal type sudo nano /boot/config.txt

Edit your config.txt by inserting the parameters below. The last two parameters will set your TV resolution & refresh rates, get your TV specs from the manufacturer.

Open another terminal and run the command tvservice -m CED for hdmi_group=1 or tvservice -m DMT for hdmi_group=2 to determine if your TV mode is in the CED or DMT group.

Then set the hdmi_group=1 if CED and do vice versa. Note the mode number and set the hdmi_mode=*.

disable_overscan=0
config_hdmi_boost=4
hdmi_ignore_cec_init=1
hdmi_ignore_cec=1
hdmi_force_hotplug=1
hdmi_ignore_edid=0xa5000080
hdmi_group=2
hdmi_mode=81