Touchscreen does not work with brightness up to max

[Evans2016]

My touchscreen does not work when I have the brightness all the way up. Once I turn it down to about 75%, it works just fine. I have the latest driver and uninstall it and install it again. When it is up high, I will get random toches all over my screen and renders my computer close to useless. 

[Echo_Lake]

@Evans2016

Thank you for posting on the HP Support Community.

• Does the touchscreen work normally when in low brightness?

Let’s try these steps:

Perform a touch screen diagnostic test in HP Hardware Diagnostics:

Use the HP PC Hardware Diagnostics UEFI tests to detect problems with the touch screen hardware.

1. Connect the AC adapter to the computer.
2. Press the Power button for at least five seconds to turn off the computer.
3. Turn on the computer and immediately press Esc repeatedly, about once every second. When the Startup menu appears, press F2.
4. When the HP PC Hardware Diagnostics screen displays, click Component Tests.
5. Click Touch Screen.
6. There are two interactive touch screen hardware tests. Click Touch Pointer Test first.
7. Read the on-screen instructions, and then click Run once.
8. Touch each of the blocks on the screen to erase them. The test ends after you erase all the blocks or after three minutes have passed, and the results display.
9. Click Main menu to return to the main screen.
10. Click Component Tests, and then click Touch Screen.
11. Click Drag And Drop Test.
12. Read the on-screen instructions, and then click Run once.
13. Drag each orange rectangle to the box indicated by the arrows with a finger or a stylus. The test ends after you reposition all the blocks or after three minutes, and the results display.

If the test passes, perform BIOS default:

1. Turn off the computer and wait five seconds.
2. Press the Power button to start the computer and repeatedly press the F10 key to enter the BIOS setup menu.
3. On the BIOS Setup screen, press F9 to select and load the BIOS Setup Default settings.
4. Press F10 to Save and Exit.
5. Use the arrow keys to select Yes, then press Enter when asked Exit Saving Changes?
6. Follow the prompts to restart your computer.

If the computer restarts normally and the error message does not display, you are done. If the error message displays, proceed to the next step.

Adjust the power management settings for your touch screen:

1. In Windows, search for and open Device Manager.
2. Expand Human Interface Devices list.
3. Right-click the touch screen device, and then click Properties.
4. On the Power Management tab, uncheck Allow the computer to turn off this device to save power, and then click OK.

Perform BIOS update: HP Notebook PCs - Updating the BIOS (https://support.hp.com/in-en/document/c00042629)

Keep me posted for further assistance,

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