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Old July 19th, 2020, 09:45 PM
viampyri viampyri is offline
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Unique Monitor Issue

I have an HP w2408h monitor that has had a unique issue for quite a long time, but it's starting to get worse.

It took me a bit to really figure out what was causing this, but there were times where my monitor would just black out, especially after I restarted my computer. It turns out this is an issue with the ambient light sensor (ALS going forward).

Anytime the ALS sensor is on, my screen goes black. If the computer is restarted, it turns itself on, if I turn the monitor power button off and then on again it turns itself on, if something really bright appears on screen it turns itself on. What I have to do when it blacks out is use the menu button on the monitor, go to the image control option, and turn the ambient light sensor off that way (I do this blindly, I now "know" which buttons to press and how many times to navigate there without seeing). Even though I disable it, as I said there are many things that trigger it, suddenly everything gets a lot brighter, the ALS enables itself and my screen goes black again (very frustrating while gaming).

My OS is Win10 64-bit HE, just FYI. With this monitor there are no adaptive brightness settings found anywhere in the computer settings or power options. It says I have the best drivers for this monitor (2009). I have owned this monitor since it was new (probably 12 years ago) and it's a great monitor sans this issue.

Can anyone help? Is there a regedit or something I can do to permanently disable the ALS in some way where even if the monitor wants to turn it on itself it's not an option?

Thanks for any and all assistance, much appreciated!
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  #2  
Old July 20th, 2020, 02:11 AM
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zipulrich zipulrich is offline
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Found this info, but try at your own risk - I haven't tried it myself. Here goes:

1. Open the registry editor by pressing Win+R and typing in regedit
2. Browse to: HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Cl ass\{4d36e968-e325-11ce-bfc1-08002be10318}\0000
3. Right-Click on the 0000 key (it looks like a folder).
4. Select New->Dword.
5. Name the new registry entry PP_VariBrightFeatureEnable
6. Double-click on the PP_VariBrightFeatureEnable entry you just created.
7. Make sure it has a value of 0
8. Click OK, close the registry editor, and restart the machine.
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  #3  
Old July 20th, 2020, 04:26 AM
viampyri viampyri is offline
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Tried this fix but unfortunately it doesn't seem to work. If something with too much brightness comes up on the screen the ALS kicks on and the screen blacks out.
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  #4  
Old July 21st, 2020, 07:17 PM
Ensign Tzap Ensign Tzap is offline
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viampyri,

Just replace the monitor.
It is at least 10 years old now, and it's not worth the trouble,
when you can buy a used or new 24" monitor for under $100.

Unless your good with doing circuit board level repairs.
8 out of 10 times, it is not worth fixing.
{Unless your really attached too it.}

STORY:
Many years back now.....
I worked with a couple of guys refurbishing monitors and older computers.
One guy would hit company auctions that sold pallets of Monitors and Computer equipment,
and purchase the pallets that had the same Make and Model Monitors, Computers, or equipment on them.
Get them back to the work shop.
Then we could go through them, and see what was wrong with some of them.

The ones that were working, got cleaned up and resold.
The worst of the bunch were used as parts donors for the ones that just need a part or two too get it up and running again.

Well.....
We stopped going to the auctions, buying up the old monitors, and other computer equipment.
Because the price had dropped so low on new monitors, and computer equipment that it was no longer profitable to refurbish them.


Signed: Ensign Tzap
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  #5  
Old July 22nd, 2020, 04:21 AM
viampyri viampyri is offline
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I may be able to buy a 24" for a low price, but not a 24" with the same picture quality. The picture/graphics still looks amazing on this monitor! Also, not looking to drop money on something either, if I was I wouldn't have come here for help to begin with.
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  #6  
Old July 22nd, 2020, 04:47 PM
Ensign Tzap Ensign Tzap is offline
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I know, money is tight.

But, the issue your having is in the monitor itself.
And unless you are knowledgeable with electronic repair,
and have the tools, parts, and maybe a schematic to fix it, you could.

Here is a used 24" HP w2408h Monitor on E-bay for $80.00.
https://www.ebay.com/i/333648874179?...SABEgId1fD_BwE
NOTE: If your interested in getting it, contact the seller first, and find out what it's condition is.
{It may just have the same problem your's has.}



Signed: Ensign Tzap

Last edited by Ensign Tzap; July 22nd, 2020 at 04:54 PM.
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  #7  
Old July 23rd, 2020, 03:51 PM
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zipulrich zipulrich is offline
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I see them at NewEgg for under a hundred.
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