H236HL Monitors not keeping brightness settings

xxPaulCPxx
xxPaulCPxx Member Posts: 4 New User
edited March 2023 in 2014 Archives

I've purchaced a bunch of H236HL monitors to go with our new Lenovo M73Tiny computers.  The M73 Tiny are DisplayPort, so I use a DP to HDMI cable.

 

I've deployed  2 of these systems so far and they both have the same problem:  After 2 minutes after loggin in, both systems revert to 0 brightness level.

 

I will go into the settings and manually adjust the brightness back up to 70% and it will stick... until you log back in again.

 

Windows 7 64bit, the H236HL is in the Device Manager.

 

Is this an issue with HDMI on these monitors?

Best Answer

  • xxPaulCPxx
    xxPaulCPxx Member Posts: 4 New User
    Answer ✓

    AH-HA!  Found it!

     

    While Windows does not have a function to power down the brightness of the monitor... LENOVO DOES.

     

    Apparently this was a function buried within the Lenovo Power Manager control.  Once I excavated that program - buried in another program - I found that the default power setting changed the brightness to 0.  I created a new power profile and only boosted the screen brightness setting... TA DA!

Answers

  • xxPaulCPxx
    xxPaulCPxx Member Posts: 4 New User

    I just switched to the included VGA cable and have exactly the same issue - after 2 minutes from login, the brightness reverts to 0.

     

    BTW, I've also just left it without loggin in for longer than 2 minutes and it kept the previous brightness setting.  After loggin in - 2 minuts - dim.

  • keith111
    keith111 Member Posts: 79 Troubleshooter

    Perhaps it is is not the monitor, but the computer settings for energy conservation. Somewhere in Control Panel --> Performance, Power Management, etc.?

  • xxPaulCPxx
    xxPaulCPxx Member Posts: 4 New User

    That was the first place I looked, but since it's a desktop it doesn't have the "Dim the monitor" settings that a laptop does.

     

    Besides that, I've set the system to turn off the monitor after 15 minutes - that works just fine!

     

    I'm hard pressed to think of a way that both DisplayPort AND VGA have a way of passing back a command to dim the monitor.  This seems more like an ECO setting of some sort within the monitor itself.

  • xxPaulCPxx
    xxPaulCPxx Member Posts: 4 New User
    Answer ✓

    AH-HA!  Found it!

     

    While Windows does not have a function to power down the brightness of the monitor... LENOVO DOES.

     

    Apparently this was a function buried within the Lenovo Power Manager control.  Once I excavated that program - buried in another program - I found that the default power setting changed the brightness to 0.  I created a new power profile and only boosted the screen brightness setting... TA DA!