Question about Sony VAIO VGC-LS21N PC Desktop

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I checked the ram modules and the thing is when i press to start the computer the led on the screen doesn't turn green , i get either one long beep or 3 beeps, and the screen remains black and it doesn't even start.

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One long beep + 3 short beeps denotes a video problem for Sony Vaio. Unfortunately it doesn't get more specific. If you have a video card, try re-seating the card. Try using a different monitor. Try upgrading the drivers (probably here: http://www.driverboost.com/lp/drivers/update/ati-video-drivers.php ) of course you will have to go to a different PC to download them onto a CD/dvd and try to run them. You might consider trying to boot into safe mode and doing a system restore. It could be many things. Without more information I can't really be of much more help. Hope one of these works for you.
Good luck

Posted on Oct 15, 2010

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Posted on Jan 02, 2017

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Dear user, this problem can be coused by many things.
1, The memory you have installed is not compatible with your system.
2, Power supply failure.
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Try thease:

Take a brush and clean the sockets.
Power on your computer without the memory modules, if you hear beep it could be a health signal :D.
Power off the system.
Clean your memory module pins with alachol or other cleaner liquid.
Wail till it dry, inster it back to the socket and move a little ud and down to catch ancontact.

Power on and now shold be work fine.

If this ain't works. Try other brand of memory, kingmax or kingston. They usually shipps with 99 of good modules from 100.

Good luck.

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