A few days ago, my Insipron 700m screen went kablooey - all it
displayed were shifting vertical lines.
I bent/manipulated the screen a little and it displayed the desktop - but
it still looked funny. The backlight wavered, the display was fuzzy/grayed-out, and
you could see a kind of faint grid pattern across the screen.
This problem remained the next time I powered up.
Then today, I powered up and the screen looks fine, no problems.
At first, I assumed the screen was shot and needed to be replaced.
Now, not so sure. Any thoughts - could this be a loose connection somewhere?
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You may have the well known issue just as I had which is the lines running up the left side from keyboard to screen which are supposed to go to the speakers easily break because they are very small and they break from just the opening and closing of the screen. It's no worry I dug it all out and still just went on Amazon and got a USB audio speaker/headphone interface for $8.
Here's what I got and I am very happy....you will save a lot of time to just grab this now... Trust me. I would never suggest if I didn't like it and have used or owned it. http://www.amazon.com/gp/aw/d/B00BP2REBK/ref=pd_aw_sims_8?pi=SL500_SS115
You have look whether the cable is lose contact.some times this will make problems.but your screen showing like a funky lines, this is due to problem of the LCD screen.you have to make it correct by giving it to the service center.
Try connecting an external monitor to the Dell Inspiron 9300 and see if the vertical line is also present on the monitor. If the monitor display is fine, then your laptop’s LCD display panel is defective. If the monitor also displays the vertical line, then your problem is with either the video card or motherboard located inside your laptop. Not sure if the Compaq Presario has an external monitor plug, but if it does the above procedure can be applied to that one as well. Your responses are intended to improve the level of service provided. Please rate your experience. Thank You.
Sounds like everything has been done that can be, new sound card, drivers, and format. The only thing left is the motherboard. It's rare, but I have seen a few machines that when the sound card went out, especially if the card went out violently by overload, short etc... the traces (circuit paths) in the motherboard, or the seat for the card on the motherboard were damaged. Have them run the traces and check the seat on the motherboard to determine if this is the cause of the problem. If this is the case, unfortunately, motherboard replacement is your only option in order to get the sound to work.