HDMI doesn't work and I can't install Radeon Mobility HD 5470 driver.

[Eugene_Lee]

Hello.

I have a serious problem about HDMI output. 

After I formatted my laptop, I installed WIndow 7 64bit. 

I downloaded and installed graphic drivers from this website (for dm4t-1100), but graphic drivers doesn't work.

It causes BSOD or black screen. I downloaded drivers from AMD website, but they don't work.

I think the reason that HDMI is not working is due to graphic drivers. (My monitor and cable are fine)

Graphic drivers for dm4t-1100 on website are not for Radeon HD 5470, but for Radeon HD 6370.

Does anybody know how to solve this problem? 

My OS: Window 7 64bit

Laptop: HP Pavilion dm4t-1100

Graphic Card: Radeon Mobility HD 5470

What : BSOD or black screen when I install graphic drivers. HDMI doesn't work.

[Jeet_singh]

@Eugene_Lee,

Welcome to the HP Forums 🙂 I would like to take a moment and thank you for using this forum, it is a great place to find answers. For you to have the best experience on the HP forum, you could also visit our HP Forums Guide for First Time Here? Learn How to Post and More. I see from your post that you are having issues with the graphics drivers on your HP Pavilion stopped working after reinstalling Windows. Don't worry we'll work together to help you find a solution.

To provide you with an accurate solution. I'll need a few more details:

Have you installed a retail copy of Windows or OEM version of Windows?

Did you try to check for any Windows update? Have you tried to update the Bios?

To resolve this issue, download the driver from Windows Updates or manually check for driver updates in Device Manager.

To update the driver with Windows Update:

1. Connect the computer to the internet.
2. Click on Start.
3. Select Settings.
4. Select Update & security.
5. Select Windows Updates.
6. Select Check for updates.
7. Windows Update will download and install the drivers automatically.

To update the driver in Device Manager:

1. Open Device Manager.
2. Locate the AMD VGA device.
3. Right click on the AMD VGA device.
4. Select Update Driver Software.
5. Follow the on onscreen instructions to update the driver.
6. Close Device Manager when the driver update is complete.

If the issue persists, I would suggest here is to uninstall the display drivers from Device manager:

Use shortcut keys Win + X on Windows 10

Select Device Manager.

Expand the entry. Right-click the problematic device and select Uninstall device.

You may need to check the option Delete the driver software for this device, and then click the Uninstall button.

Now restart the computer and then update the Bios, Chipset and graphics card drivers on your PC from our HP support website, using this link.

Also, download and install HP support assistant on your PC. It should automatically download and install the latest updates and drivers for your PC.

Refer this link to know how to use HP support assistant.

Could you please respond to this post with the details and with the results of the troubleshooting as this will help me in further assisting you.

Eagerly waiting for your response!

that said, If the information I've provided was helpful, 

give us some reinforcement by clicking the solution and kudos buttons, 

that'll help us and others see that we've got the answers!

Good Luck.

[Eugene_Lee]

Thank you for your post.

I tried to follow your instruction, but the issue persists. 

I  think there is a conflict between Intel(R) HD Graphic driver and ATI Mobility Radeon HD 5470 driver.

If ATI driver works, Intel driver doesn't work. If Intel driver works, ATI driver doesn't work.

HP assistant program is not able to fix this problem. 

I need installable drivers for graphics.

Do you need any information? please help me to fix this problem. I need to use HDMI.

Thank you.

[Jeet_singh]

@Eugene_Lee,

Thanks for the update,

As I understand you have tried to follow the steps suggested and nothing has helped to resolve this issue.

In this scenario, I would suggest here is to attempt to perform a system restore to a previous date where it was all working fine.

For more details, please follow this link: HP PCs - Using Microsoft System Restore (Windows 10, 😎

If the issue still persists, the last resort would be to perform a system reset - HP PCs - Resetting Your Computer (Windows 10)

Hope this answers your question.

Good luck and keep me posted about the developments. If this helps, please mark this as “Accepted Solution” as it will help several others with the same issue and give the post a Kudos for my efforts to help. Thank you and have a great week ahead. 🙂

[Eugene_Lee]

Thank you for all your helps.

However, I am not able to fix this problem.

I dont know how to fix it now.

Thank you.

[Riddle_Decipher]

@Eugene_Lee

I'm the Riddle_Decipher & I'm writing on behalf of my colleague @Jeet_singh, as the tech is out for the day,

that said, I have reviewed your concern and the entire conversation, did some research and here's what I recommend:

I recommend you go through the links suggested by the previous tech as it contains all the steps you need to resolve your concern,

If the issue persists, please check your Private message icon on the upper right corner of your HP Forums profile, using the blue envelope: 

Click here for more details on how to access the private messages on HP Forums

I hope your day gets better, good luck.