HDMI laptop to TV not working

[ALN74]

I have a Vizio monitor that I was able to connect to my laptop via HDMI cable last month.  I did this on a number of occasions with no issues, but less than a month later I tried to do it again and it doesn't work.  The monitor says there is no signal, whereas before it was a direct connection.  I don't know what happened.  Help.

[Tardis40]

Hi @ALN74,

Thanks for becoming a member of the HP Support Forums. I understand you are having an issue with connecting by HDMI. I will be glad to help you.

Please post the full product number of  your computer. See the following, if you need help with that information.
How Do I Find My Model Number or Product Number?

Please get back to me with above information, so I can help you better.

[ALN74]

Product # A3F84AV

[Tardis40]

Hi @ALN74,

Thank you for the information.

Please follow the step from this document Troubleshooting HDMI Display and Sound Issues.

Please keep me informed of how things went. 

If you require further assistance, let me know and I will gladly do all I can to help you.

Please let me know if this resolves the issue by marking this post as "Accept as Solution".
To simply say thanks, click the Thumbs up below! 🙂

Thanks.

[ALN74]

Tardis40, thank you for getting back to me.  Unfortunately, I found this article BEFORE contacting you and tried all the applicable solutions to no avail.

A.  It is the correct cable as it worked last month... it is only recently that it stopped working.

B. Sound isn't the issue as there is no video link.  HOWEVER, in "sond" window, HDMI is not even an option (headphones and speakers is one, communications headphones is the other)

C. Two options, see "B"... neither is an issue

D.  Specific issues:

1. Hard Reset... did this and did not work

2. Error Message N/A

3. Sound/No Video N/A but BIOS is up to date according to HP Assistant

4. Surroundsound N/A

5. HDMI icon disappeared... thought this would solve issue, but tried 3 different times and doesn't work

6. "always working" N/A

7. "Not plugged in" N/A

Any other suggestions?  Thanks.

[Tardis40 · Accepted solution]

@ALN74,

Please use the following http://www.hp.com/contacthp and create a case for your issue and contact HP. If you live outside the US/Canada, please click the link below to get the contact information for your region.
http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html

[pattyk2016]

Hi,

Were you able to find a solution?  I have the same problem. My hp warranty expired, so I don't know that I can open a case like they advised you.

Thank you,

[AlSuper]

Same problem. My G72 used to connect to my Vizio (LED) and my Panasonic (Plasma) in Windows 7. Recently updated to Window10, and now receive the same "no signal" message as previously reported. Have tried many fixes in control panel, display without success. Would appreciate any help.

[Parkkuteemu]

The drivers that get installed during Windows 10 upgrade do not support, for example, switchable graphics feature (on older laptops like G72) . HDMI no longer works. As recommended on forums - to fix HDMI you can install AMD_UnifL/Catalyst_16.2.1_UnifL_v1.0.exe drivers like I did.