Satellite P500 - Can't increase screen brightness

I have a new Satellite P500.
The problem I have is if I have the power switched off for several hours I lose the ability to increase the brightness of the screen. I can get the brightness increase at level 4 and when I increase to level 8 the brightness decrease. If I go down the screen goes black. The only solution I have found is to power down, take out the battery put it back in and power up.
Help would be greatly appreciated.

Hi
I would recommend to recover the notebook
This would allow you to reinstall the OS and to set the notebook to the factory settigns.
I think the issue might be related only to software problem maybe something wrong with installed VAP or other tools however its necessary to known if this will happen using Toshiba preinstalled OS
Dont install any 3rd party software before testing this display brightness FN+F6 and F7 key combination.

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Hi Clarinet187,
Welcome to Lenovo Community Forums!
As per the query you are facing issue with screen brightness for your ThinkPad T500.
Please go to start and type device manager, open device manager and check if there is any yellow mark in any of the adapter.
Please click here to get the complete steps on the issue.
Hope this helps.
Best regards,
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Hello myizham,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand you are having issues adjusting the screen brightness on you HP Envy 23 Beats Edition All in One PC. I would be happy to assist you, but first I would encourage you to post which operating system you are using. And whether your operating system is 32-bit or 64-bit as with this I can provide you with accurate information.
Which Windows operating system am I running?
Is the Windows Version on My Computer 32-bit or 64-bit?
Please re-post with the requested information and I would be happy to provide you with assistance. Thank you for posting on the HP Forums. Have a great day!
Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
Dunidar
I work on behalf of HP
Find out a bit more about me by checking out my profile!
"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter

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http://www.linlap.com/wiki/hp+probook+4510s
http://www.linlap.com/wiki/hp+elitebook+8460p
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Hello myizham,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand you are having issues adjusting the screen brightness on you HP Envy 23 Beats Edition All in One PC. I would be happy to assist you, but first I would encourage you to post which operating system you are using. And whether your operating system is 32-bit or 64-bit as with this I can provide you with accurate information.
Which Windows operating system am I running?
Is the Windows Version on My Computer 32-bit or 64-bit?
Please re-post with the requested information and I would be happy to provide you with assistance. Thank you for posting on the HP Forums. Have a great day!
Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
Dunidar
I work on behalf of HP
Find out a bit more about me by checking out my profile!
"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter

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Adam did you know that the adobe forums has a search function!
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Hi @gsh987 ,
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I would be happy to assist if needed. How Do I Find My Model Number or Product Number?
Please let me know.
Thanks.
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom to say “Thanks” for helping!

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Hi, and a warm welcome to the forums!
How much Free space do you have on what size HD?
Might give a try with Applejack...
http://www.versiontracker.com/dyn/moreinfo/macosx/19596
After installing, reboot holding down CMD+s, then when the DOS like prompt shows, type in...
applejack AUTO
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At least it'll eliminate some questions if it doesn't fix it.
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Correct any Disk problems.
Repair Permissions.
Clear out Cache Files.
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Dump the VM files for a fresh start.
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"Try Disk Utility
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3. Click the First Aid tab.
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Satellite P500 - Can't increase screen brightness

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