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the worse thing it could be is the lcd going out in a very bad way. Yes likely to get wrose over time, No not the video card because it happends on every screen, boot,preboot,and windows so guess what? If you have the lcd replaced you will be looking at a good laptop once again. Price aroung $75-100 bucks where? Ebay of all sources. Thanks I hope this was Very Helpful to you if so lay ing your ratings.
Open the processor area located under your laptop. You can detached and re attached the processor, some sort of lose contact on pins. If same problem occur, your processor may burnt out. pm me email@example.com i will assist you remotely.
If you have to wiggle the power cord it is most likely the DC jack on the motherboard. It is usually the center pin in the the jack that breaks the solder point and the small tension band inside the jack housing weakens.
Sounds silly but, try muting your built in microphone, because i'l bet, the mic is picking up the sound from yours speakers and causing the echo.
That's wot i've found on a few occassions.
Other than that, check sound and video drivers by click Start>Run, then type in 'dxdiag' (without quotes) this will run a diagnostic on audio and video.
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