For the last year, I've had a laptop connected to my TV via an HDMI cable so the TV can act as an extended projector and allow me to stream videos, etc. from the laptop and onto the TV. Yesterday, I noticed that the laptop and TV will no longer connect to one another.
The connection was working as of about two or three weeks ago and no settings were changed on either the laptop or the TV in the meantime.
This laptop lives on the coffee table and is rarely used for anything other than video streaming. I almost never disconnect the HDMI cable from the laptop. The only applications on it that get used are VLC player, Windows explorer and, occasionally, Firefox.
When I connect the HDMI cable in the laptop's slot, the laptop beeps like it normally does when I connect an HDMI cable and the screen blinks as the display splits, like normal. The issue is that the TV still states "no signal" when connected to the laptop.
I've checked the display settings for the laptop's screen resolution and the TV display is clearly present and I can even switch to the TV resolution, but the TV still claims that there is no signal and I have to just unplug the HDMI cable to get the laptop screen to show again.
Typically when I split the screen on the laptop and TV, I use the Windows key and hit "P" to move between the different projector types. I have tried each of the different projector settings (Disconnect, Duplicate, Extended, Projector-only) and the laptop blinks like it normally does when I change those settings, but no display appears on the TV.
When I select "Projector-only" the laptop screen goes completely dark, so it must be connecting to something, but nothing appears on the TV screen.
I've hooked up a very similar laptop to the exact same connect (no variation to the TV connection, etc.) and the TV extends the display just like normal, so I'm sure this must have something to do with this specific laptop.
I've also taken the following steps to resolve this issue:
- I've restarted both the laptop and the television
- I've updated all of the Windows updates available for the laptop
- I've checked the connections on both the laptop and the TV
- I've checked all the settings on the TV to determine if something may have been reset
- I've gone through the laptop's display settings to see if the laptop just did not "see" the TV, but found the laptop can see the TV just fine
- I've tried a system restore to over a month ago (well past the time when the connection was last working), but the problem persists.
I've searched and searched, but I've still not found an answer to this problem. All the "resolutions" I've found online point to issues with the HDMI cable or the TV not set to the right output, but after testing with a different laptop, I know that none of those match my problem.
The only thing I can think of at this point is that there is maybe some sort of driver issue, but then I'm not sure why the laptop would blink and beep and show the TV in the resolution settings if the drivers were the issue.
The laptop is just a cheap HP G42 with just 3 GB of RAM, AMD Turion Dual Core processor, running Windows 7 and is about a year old. The TV is a Sony Bravia that is about 18 months old.
Any help with this would be appreciated.