Why doesn't my TV display my computer's HDMI output, only under Windows 7?

windows-7 windows hdmi multiple-monitors

26,952

Solution 1

The problem probably is caused by the manufacturer of video card.

I bought a new vide card(ATI 5450 series), which works well.

Solution 2

Press the (Windows key + P) to change from the 4 different ways to use multiple monitors/projectors; it could be that you are using it in computer only mode. Since you did mention that Ubuntu shows up.

26,952

Kane

I’m the father of three boys. Live in Beijing. Also I’m the *uix user, a full stack software engineer, devops and cloud native evangelist.

Updated on September 17, 2022

Comments

Kane over 1 year

I am trying to connect my PC to my TV via HDMI. It works fine under Ubuntu, but it's not working under Windows 7 (32-bit).

The video card is an ATI 4670, the TV is a Philips 74xx series and the monitor is a Dell 19" model that connects to the PC via VGA.

The TV receives signal and shows picture while the PC is booting (i.e. during the BIOS self-check and the Windows 7 logo). However, the TV says there is no signal after the Windows login screen comes up.

I have installed the latest CCC and ATI video card driver. Does anyone have any ideas?
- Prerak Diwan over 13 years
  
  is the pc a laptop?
- Kane over 13 years
  
  @KronoS, it's a pc
- Xantec over 13 years
  
  for fun have you tried connecting just the TV to the computer, to see if it will work on its own?
- Supercereal about 13 years
  
  Do you have your desktop extended or cloned to the tv? If not it will just shut off the TV when Windows boots.
- Yoh about 13 years
  
  I can't find your tv on the philips website (only 76xx models) but if it supports VGA, did you try connecting your pc through VGA yet?
- Tog about 13 years
  
  I know the card uses an ATI chip, but who actually made the card? e.g. ASUS, Sapphire, etc.
- Kane about 13 years
  
  @Yohsoog, I can't remember the exact model of my TV. It has the VGA port, but I didn't try it.
- Kane about 13 years
  
  @Tog, the manufacturer of video card is dataland that locates in China Mainland.
- Yoh about 13 years
  
  @Kane and can/will you try it?
Kane over 13 years

it's weird. The CCC or windows 7 could detect the tv as the second monitor when the power of tv is off. It won't detect the tv when turning on the tv or switching to the signal source to hdmi.
Danny Staple over 13 years

Have you tried switching through the different HDMI signal sources?
Danny Staple over 13 years

When connecting to the PC is it via a DVI connector?
Kane over 13 years

Tried switching different HDMI signal source, but it doesn't work. The video card supports VGA, DVI and HDMI output. Currently HDMI connects with tv, VGA connects with 19' Dell monitor. I don't have DVI cable, so no chance to try connect pc monitor via DVI.