Question about HP Pavilion dv8130us Notebook
By using the VGA output with a projector and having it show up clearly and as expected is a sign that the video card/GPU is working properly.
Furthermore, the symptom that you explain of a rolling screen I interpret as meaning that you can see the image that is meant to be displayed, but it keeps moving from the bottom of the screen to the top and rotating. IF this is correct it sounds like DA converter on the LCD is your culprit. It is the chip that is in charge of interpreting the signal coming from the GPU and sending it to the LCD elements at the prescribed refresh rate (generally 60 hertz). The rolling image is an indication of the refresh rate not being met by the LCD.
Things to check:
1) While plugged into the projector, open the Windows Control Panel then the Display Icon. Go to the Settings Tab.
2) If the Display settings show 2 output displays, ensure the built-in LCD is the one clicked on in the graphic then click the Advanced Settings button/link.
3) Once that window appears go to the Monitor Tab and set the option to the lowest numbered option. Generally this will be 60 or lower. Then press OK. The screen will flicker and HOPEFULLY you will get a clear/non-rotating LCD display. If not, I'd venture that the LCD itself has gone bad again. Perhaps there is a root cause such as a powering issue that is providing too many amps to the LCD but that would take some hefty investigation to resolve the power that is supposed to be provided and a multimeter to figure out the actual voltage/amperage.
Hope this helps!
Posted on Mar 17, 2011
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Posted on Jan 02, 2017
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