Black monitor after 3 beeps while system is working

Ask a question amir - Last answered on Sep 3, 2017 at 11:23 PM by amir

I left my Dell Laptop Studio 1557 in sleep mode and when I turned it on, I heard 3 beeps( first one higher) then monitor stayed completely black while I could hear that CPU fan is working and after a while I heard the windows alert and other alerts which regularly I had when system came up. I changed the RAMs and I heard 4 beeps then kept same as before. Also pushed D button while restarting and saw different colours on Monitor. Could it be a VGA problem? I would appreciate if you could help me.

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The four beeps definitively indicate a memory failure.

Ensure that your ram sticks and slots are clean, perhaps that a brand new stick will do.

However the 3 beeps meant a system board failure which may point to the slots.

Good luck
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Hi Ambucias,

Thank you so much for your reply. I wonder when I cleaned the slots nothing happened and monitor is still black. Plus, I can hear Windows's sound and other software popped up but invisible.

Ambucias 47034Posts Monday February 1, 2010Registration date ModeratorStatus November 23, 2017 Last seen - Sep 3, 2017 at 05:39 PM
Now you tell me! Interesting, as we say, but only in Canada.

How did you managed to get other software to open when you have a black screen?

If you look at your screen at a wide angle or sharp angle see if you get a glimpse of your desktop.

You tell me that you can hear Windows and other software, since I can't get my hands on your machine, my educated guess is that your back lights are fried.

amir- Sep 3, 2017 at 05:57 PM
Yes, I can hear all sounds from my laptop same as before(Windows 7, Antivirus, and specific automatic software pop-ups), of course after a few minutes while monitor is black

Thanks for sharing your knowledge.

All the best
Ambucias 47034Posts Monday February 1, 2010Registration date ModeratorStatus November 23, 2017 Last seen - Sep 3, 2017 at 06:21 PM
I am really astonished that you can hear your antivirus. What kind of sound does it make?

I have Kaspersky and it's total silence as a matter of a fact I have not heard a windows sound since Windows 98.

You are special.
amir- Sep 3, 2017 at 11:23 PM
Actually, before this problem happens, when my system came up because of some discrepancy in drivers, automatically some windows popped up with some beeps which I knew them. And one of them was one alert from my antivirus which I was used to it. Mostly I confront with unexperienced problems!!!!

Thank you so much
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