Having problems with your HP Pavilion dv9000t PC Notebook ?
DV9000 Black Screen
\015 If I boot up my DV9000 with the lid open (90 degrees) the screen is black. If I boot up with the lid open about 30 degrees, just enough to get to the power on button, the display is normal. Once I peek in and see the desktop is up I can open the lid and the display stays on. I suspect the magnetic lid switch. Any way to troubleshoot/verify this problem?\015
You just need to diable presentation mode.It's not the switch.
The issue here is the magnetic switch.
Repair Help & Product Troubleshooting for HP Pavilion dv9000t PC Notebook
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